Present-day Pontiac, Michigan was traversed for thousands of years by indigenous peoples due to the confluence of the Saginaw Trail and the Nottawassippi River; the river's indigenous name was replaced with the Clinton River name by settlers coming from New York State where DeWitt Clinton served as Governor. The Saginaw Trail was an important land trail route for indigenous peoples that ran from the Saginaw Bay in Michigan to the Detroit River in present-day Detroit.

Early European expeditions into the land north of Detroit described the area as having "extreme sterility and barrenness". Developments and exploration were soon to prove that report false.

The first European-American settlers arrived in what is now the city of Pontiac in 1818. They followed the Saginaw Trail north from Detroit and determined the settlement should be where the trail and the river crossed. Two years later the fledgling settlement was designated as the county seat for Oakland County, due in part to the Michigan Territorial Governor Lewis Cass being receptive to the lobbying of The Pontiac Company's members that their recently acquired property was ideal for the county seat location.

The Pontiac Company, consisting of 15 members and chaired by Solomon Sibley of Detroit, comprised the first landowners in Pontiac. Sibley, along with Stephen Mack and Shubael Conant, Pontiac Company members, also formed the partnership Mack, Conant & Sibley to develop a town. Solomon and his wife Sarah Sibley largely financed construction of the first buildings. While Solomon was the first chair of the Pontiac Company, for two years Sarah Sibley was the most active as the go-between with settlers at Pontiac. Solomon Sibley was constantly traveling as a Territorial Congressman and later a Territorial Supreme Court judge. The Sibley-Hoyt house, thought to be one of the first structures in Pontiac, is preserved by its private owner.

In the 1820s Elizabeth Denison, an unmarried, free black woman, worked for the Sibleys. They helped her buy land in Pontiac in 1825. Stephen Mack, agent for the Pontiac Company, signed the deed at the request of the Sibleys, conveying 48.5 acres to Elizabeth Denison. She is believed to be the first black woman to purchase land in the new territory of Michigan.

In 1837 Pontiac became a village, the same year that Michigan gained statehood. The town had been named after the noted Ottawa Indian war chief who had his headquarters in the area decades before, during the resistance to European-American encroachment. Founded on the Clinton River, Pontiac was Michigan's first inland settlement. Rivers were critical to settlements as transportation ways, in addition to providing water and, later, power.

The village was incorporated by the legislature as a city in 1861. From the beginning, Pontiac's central location served it well. It attracted professional people, including doctors and lawyers, and soon became a center of industry. Woolen and grist mills made use of the Clinton River as a power source.

Abundant natural resources led to the establishment of several carriage manufacturing companies, all of which were thriving at the turn of the 20th century. One of the largest carriage manufacturing companies in Pontiac of that era was the O.J. Beaudette Wagon Works, which made bodies for carriages and then transitioned to manufacturing bodies for automobiles. At that time, the first self-propelled vehicles were introduced. Pontiac quickly became a capital of the new automotive industry.

Throughout the 1910s and 1920s, Pontiac had tremendous growth in its population and size as tens of thousands of prospective autoworkers moved here from the South to work in its GM auto assembly plants at Pontiac Assembly. African Americans came in the Great Migration, seeking work, education, and the chance to vote and escape the oppression of Jim Crow in the South.

As the small "horseless carriage" manufacturers became consolidated under the mantle of the General Motors Corporation, Pontiac grew as the industry grew. It also suffered the same setbacks as other cities during the Great Depression years of the 1930s. The buildup of the defense industry and conversion of the automotive industry to war demands increased the need for labor. Pontiac was a pivotal concentration of wartime production for the United States in World War II. Among many other vehicles and weapons, Pontiac facilities produced thousands of GMC trucks, Oerlikon anti-aircraft guns, naval torpedoes, tank axles, amphibious vehicles, and munitions.

The first postwar years after World War II were a time of prosperity, and continued migration of African Americans to the city in the second wave of the Great Migration, but the city changed as suburbs were developed and people commuted by car to work. The more established residents moved out to buy newer housing being built in the suburbs, draining off business and resulting in vacancies downtown. Racist policies and racial animus toward the growing African American population was also an important factor, and until the mid-1960s with the enactment of Fair Housing ordinances, most of the properties in Pontiac neighborhoods contained racially restrictive covenants in the deeds.

In order to prevent flooding, Pontiac confined the Clinton River in concrete through the downtown in 1963. Changing ideas about urban living in the early 21st century prompted the city to study uncovering the river to create a waterfront community in the city.

In late 1966, Pontiac-born real estate developer A. Alfred Taubman tried to build a large-scale shopping mall on vacant downtown land (where the Phoenix Center now stands). It was unsuccessful. Pontiac resident C. Don Davidson and his University of Detroit architectural class created a more comprehensive plan for development to benefit the city and the entire region around it. In 1969, the city of Pontiac adopted the Pontiac Plan as the official plan for rebuilding the vacant area of the downtown district.

In 1965, Davidson overheard news that the Detroit Lions were seeking a new football stadium in Southeast Michigan. Professor Davidson and city leaders made a push to develop a new multi-purpose stadium, which was built and became known as the Silverdome. Construction began on the 80,000-seat stadium in 1972 and it opened in 1975 as the Pontiac Metropolitan Stadium.

This was a part of Davidson's vision for Pontiac. Besides becoming the new home stadium of the NFL's Detroit Lions, NBA's Detroit Pistons and USFL's Michigan Panthers, the arena hosted such events as the 1979 NBA All-Star Game, the 1982 Super Bowl XVI game between the San Francisco 49ers and Cincinnati Bengals, and four matches of soccer's 1994 World Cup.

In 1968 there was an outbreak of a flu-like disease called Pontiac fever. After the discovery of the bacterium Legionella pneumophila in 1976 in Philadelphia, blood specimens from 1968 were re-examined and the same bacterium was found.

On August 30, 1971, ten school buses were destroyed in a bombing during white resistance to a federal court order to desegregate the city's public schools.

Construction began in the 1970s on an urban renewal project known as the "Pontiac Plan". The initial phase of this plan included the Phoenix Center, three office buildings, a transportation center, and a high-rise residential complex. The remainder of the plan was never completed. The city has struggled with declining population since 1980, due to industrial restructuring and the loss of jobs, especially in the automotive industry.

From 2009 through 2013, Pontiac was under the oversight of an Emergency Financial Manager appointed by the state government. The Emergency Manager was authorized to make day-to-day executive and financial municipal decisions. The position was not subject to the usual checks and balances, nor to election. The first and second managers, Fred Leeb and Michael Stampfler, were appointed by Michigan Governor Jennifer Granholm. The third manager was Louis Schimmel, who was appointed by Governor Rick Snyder.

In order to balance the budget, state-appointed emergency managers drastically revised labor union contracts with the city, sold off city assets such as parking meters, and privatized most public services. The Oakland County Sheriff's Office handles all police (saving $2 million a year) and nearby Waterford township has responsibility for fire protection (saving $3 million). Pontiac sold its water treatment plant for $55 million, and outsources garbage collection, animal control, vital records and street maintenance. Many people working in City Hall are employed by contractors. The city payroll has declined from 600 to 50 employees. The Silverdome Stadium, once valued at $22 million, was sold for $583,000 (it would end up being demolished in December 2017). The emergency managers reduced the city's annual spending to $36 million from $57 million, and erased almost all of its long-term debt.

In August 2013, Schimmel resigned as Emergency Financial Manager. Schimmel now serves as part of the four-member Transition Advisory Board for the city. Other members of the board include Deputy Oakland County Executive Bob Daddow, Rochester Hills Finance Director Keith Sawdon, and Ed Karyzno, administrator of the Michigan Department of Treasury's Office of Financial Responsibility.

In July 2012, Mayor Leon Jukowski and Emergency Financial Manager Louis Schimmel announced plans to demolish the Phoenix Center. Its vacancy rates were high, and the city did not want to continue the high maintenance costs. New thinking about downtown was to re-emphasize the street grid; the city wanted to reconnect Saginaw Street to the downtown area. Owners of the connecting Ottawa Towers filed an injunction, claiming the demolition would devalue their property and result in lost parking. In December 2012, a judge granted an injunction for the Ottawa Towers on an "expedited calendar", which prevented the demolition of the Phoenix Center for the time being.

In 2010, city leaders and business owners had launched "The Rise of The Phoenix" initiative. This plan was intended to attract businesses interested in downtown retail space. The applicants selected would be given free rent in exchange for multi-year leases (two years or more) as well as one year of free parking in city lots. Some 52 new businesses were recruited to locate in downtown Pontiac, bringing new life to the city. Plans for the development of mixed-use and loft flats in downtown were announced in September 2011 by the Michigan Economic Growth Authority (MEGA). MEGA estimates the development could generate $20.4 million in new investment and create up to 107 permanent full-time jobs in downtown. The development was to be supported by a state tax break.

On January 26, 2012, West Construction Services began the renovation and restoration of the former Sears building for the Lafayette Place Lofts, the largest construction investment in Downtown Pontiac in approximately 30 years. The 80,000-square-foot (7,400 m) project is a Leadership in Energy and Environmental Design (LEED) certified residential and commercial mixed-use development: it will have 46 new urban rental lofts, a fresh food grocery store and café, and a fitness center. Construction was completed during 2012, and the lofts and market opened in December of that year. 10 West Lofts, another development in the area, will bring more residents to downtown Pontiac.

According to the United States Census Bureau, the city has a total area of 20.29 square miles (52.55 km), of which 19.97 square miles (51.72 km) is land and 0.32 square miles (0.83 km) (1.58%) is water.

Pontiac is bounded by the city of Auburn Hills to the east and north, the city of Lake Angelus to the north, Waterford Township to the west, and Bloomfield Township to the south.

The former Pontiac Township included what are now the cities of Pontiac, Lake Angelus, and Auburn Hills. The last remaining portion of the township incorporated as the city of Auburn Hills in 1983. Although the township no longer exists as a civil entity, it is still used as a survey township for land use purposes.

As of the census of 2010, there were 59,515 people, 22,220 households, and 13,365 families residing in the city. The population density was 2,980.2 inhabitants per square mile (1,150.7/km). There were 27,084 housing units at an average density of 1,356.2 per square mile (523.6/km). The racial makeup of the city was 34.4% White, 52.1% African American, 0.6% Native American, 2.3% Asian, 6.2% from other races, and 4.5% from two or more races. Hispanic or Latino residents of any race were 16.5% of the population.

There were 22,220 households, of which 35.7% had children under the age of 18 living with them, 26.4% were married couples living together, 27.0% had a female householder with no husband present, 6.7% had a male householder with no wife present, and 39.9% were non-families. 33.1% of all households were made up of individuals, and 8.7% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.28.

The median age in the city was 33.4 years. 27.2% of residents were under the age of 18; 11.2% were between the ages of 18 and 24; 28.2% were from 25 to 44; 24.2% were from 45 to 64; and 9.3% were 65 years of age or older. The gender makeup of the city was 49.1% male and 50.9% female.

As of 2000, the median income for a household in the city was $31,207, and the median income for a family was $36,391. Males had a median income of $31,961 versus $24,765 for females. The per capita income for the city was $15,842. About 18.0% of families and 22.1% of the population were below the poverty line, including 29.3% of those under age 18 and 15.7% of those age 65 or over.

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• 1837 - Incorporated as a village by an act of the Michigan Legislature. The first election was held in the same year and voters elected to be governed by a seven member board of trustees.
• 1861 - The State of Michigan redesignated Pontiac as a city which adopted the mayor-council form of government with the city divided into five wards with two aldermen elected from each ward and the mayor elected at large.
• 1911 - The city adopted a new charter providing for a commission form of government consisting of a mayor and two commissioners elected by the city at large on a nonpartisan basis each to three year terms of office.
• 1920 - The city adopted a new charter providing for a commission-manager form of government consisting of seven commissioners elected by the city at large on a nonpartisan basis and a mayor elected by one of the seven to act as mayor.
• 1982 - The city adopted a new charter providing for a strong-mayor form of government consisting of seven commissioners and a mayor elected by the city at large on a nonpartisan basis for 4-year terms

The mayor of Pontiac is Tim Greimel.

The city of Pontiac operates under a strong mayor system. The mayor serves as the chief executive of the city while holding all responsibilities of the city's executive branch. These responsibilities include proposing a city budget, ensuring that all laws are followed accordingly, as well as delivering a State of the City address. The Pontiac mayor also is responsible for appointing several positions in office including deputy mayor as well as overseeing the law, financial, police, and fire departments.

Wallace E. Holland (1974–1986 and 1990–1994) was the first African American elected as Mayor of Pontiac, and the first directly elected Mayor following the adoption of the revised Pontiac City Charter in 1982.

Deirdre Holloway Waterman, was an ophthalmologist who was elected as Pontiac's first female mayor by more than 68% of the vote on November 5, 2013. She was re-elected in 2017 with 57% of the vote. Her late husband, William Waterman, was a prominent attorney in the community who was appointed in 1988 by Michigan Governor James Blanchard to the District Court in Pontiac and elected multiple times to continue serving; he died in office in 2003. The District Courthouse was renamed in his honor, the William J. Waterman Hall of Justice. Then-incumbent Mayor Deirdre Waterman was removed from the August primary ballot due to unresolved campaign finance violations, but continued as a write-in candidate in the primary election. She was not successful in that effort.

In November 2021, Tim Greimel, who previously served as a Michigan State Representative and Oakland County Commissioner in districts that included Pontiac, was elected Mayor in the general election. He won with 61.66% of votes, while his general election opponent Alexandria T. Riley received 37.50% of the vote. Riley, a frequent candidate for office in Pontiac, previously served as a city employee under Mayor Deirdre Waterman and more recent worked for the Genesee County Land Bank Authority.

Mayors of Pontiac, Michigan

Image Mayor Years Notes Harry Mitchell 1932–1933 Resigned April 1933 Frank B. Ruf 1933–1936 F. Homer Newton 1936–1937 Victor E. Nelson 1937–1938 Appointed mayor after the resignation of his predecessor in January 1937 James C. Mahar† 1938–1939 Died in office, August 1939 Samuel G. Backus 1939–1940 George W. Booth 1940–1942 Joseph H. Potts† 1942–1943 Died in office Phillip R. Sauer 1943–1944 Arthur J. Law 1944–1948 John C. Cowe 1948–1949 Resigned in August 1949 J. H. Patrick Glynn 1949–1950 Picked by the council after his predecessor resigned John H. Ridgway 1950–1952 Arthur J. Law (2nd term) 1952–1954 William W. Donaldson 1954–1958 Philip E. Rowston 1958–1962 Robert A. Landry 1962–1964 William H. Taylor 1964–1970 Robert F. Jackson 1970–1974 Negotiated the relocation of the Detroit Lions to Pontiac Wallace E. Holland 1974–1986 First African-American mayor Walter L. Moore 1986–1990 Wallace E. Holland (2nd term) 1990–1994 Charlie Harrison Jr.† 1994–1995 Former 62nd district Michigan state representative (1974–1994) Died in office in 1995. Walter L. Moore (2nd term) 1995–1998 1998–2002 Appointed to complete Harrison's term Willie J. Payne 2002–2006 Clarence Phillips 2006–2010 Leon Jukowski 2010–2014 Deirdre Holloway Waterman 2014–2022 First female and first female African-American mayor Tim Greimel 2022–present

The city levies an income tax of 1 percent on residents and 0.5 percent on nonresidents.

As of 2024, the Pontiac library board consists of Rosie Richardson (chairperson), Yvette Brinker Marion (vice chairperson), Mattie Mckinney Hatchett (treasurer), Angela Allen (secretary), and H. Bill Maxey (trustee).

The East Campus of the Oakland County Service Center is located in Pontiac. It includes the county courthouse and jail for adults.

Residents are zoned to the School District of the City of Pontiac. The district runs one main high school, Pontiac High School. There were once two high schools, Pontiac Northern and Pontiac Central, but by December 2008 administrators were making plans to consolidate the schools.

Four charter schools operate in Pontiac; they are Pontiac Academy for Excellence (K-12), Arts and Technology Academy, Walton Charter, and Great Lakes Academy. Pontiac is also home to Notre Dame Preparatory High School, a private Catholic school located in the North East area of the city.