Royal Oak is a city in Oakland County in the U.S. state of Michigan. As of the 2010 census, the city had a population of 57,236.The city is located along the Woodward Corridor, and Interstate 75 and Interstate 696 also pass through Royal Oak. As a northern suburb of Metro Detroit, the city is about 3 miles (4.8 km) north of the city of Detroit. Portions of the Detroit Zoo are within Royal Oak, extending into neighboring Huntington Woods.
Detroit (, locally also ) is the largest and most populous city in the U.S. state of Michigan, the largest U.S. city on the United States–Canada border, and the seat of Wayne County. The municipality of Detroit had a 2020 population of 639,111 according to the 2020 census, making it the 27th-most populous city in the United States. The metropolitan area, known as Metro Detroit, is home to 4.3 million people, making it the second-largest in the Midwest after the Chicago metropolitan area, and 14th-largest in the United States. Regarded as a major cultural center, Detroit is known for its contributions to music and as a repository for art, architecture and design, along with its historical automotive background.Detroit is a major port on the Detroit River, one of the four major straits that connect the Great Lakes system to the Saint Lawrence Seaway. The City of Detroit anchors the second-largest regional economy in the Midwest, behind Chicago and ahead of Minneapolis–Saint Paul, and the 13th-largest in the United States. Detroit is best known as the center of the U.S. automobile industry, and the "Big Three" auto manufacturers General Motors, Ford, and Stellantis North America are all headquartered in Metro Detroit. As of 2007, the Detroit metropolitan area is the number one exporting region among 310 defined metropolitan areas in the United States. The Detroit Metropolitan Airport is among the most important hubs in the United States. Detroit and its neighboring Canadian city Windsor are connected through a highway tunnel, railway tunnel, and the Ambassador Bridge, which is the second-busiest international crossing in North America, after San Diego–Tijuana.In 1701, Antoine de la Mothe Cadillac founded Fort Pontchartrain du Détroit, the future city of Detroit. During the late nineteenth and early twentieth century, it became an important industrial hub at the center of the Great Lakes region. The city's population became the fourth-largest in the nation in 1920, after only New York City, Chicago and Philadelphia, with the expansion of the auto industry in the early 20th century. As Detroit's industrialization took off, the Detroit River became the busiest commercial hub in the world. The strait carried over 65 million tons of shipping commerce through Detroit to locations all over the world each year; the freight throughput was more than three times that of New York and about four times that of London. By the 1940s, the city's population remained the fourth-largest in the country. However, due to industrial restructuring, the loss of jobs in the auto industry, and rapid suburbanization, Detroit entered a state of urban decay and lost considerable population from the late 20th century to the present. Since reaching a peak of 1.85 million at the 1950 census, Detroit's population has declined by more than 65 percent. In 2013, Detroit became the largest U.S. city to file for bankruptcy, which it successfully exited in December 2014, when the city government regained control of Detroit's finances.Detroit's diverse culture has had both local and international influence, particularly in music, with the city giving rise to the genres of Motown and techno, and playing an important role in the development of jazz, hip-hop, rock, and punk. The rapid growth of Detroit in its boom years resulted in a globally unique stock of architectural monuments and historic places. Since the 2000s conservation efforts have managed to save many architectural pieces and achieved several large-scale revitalizations, including the restoration of several historic theatres and entertainment venues, high-rise renovations, new sports stadiums, and a riverfront revitalization project. More recently, the population of Downtown Detroit, Midtown Detroit, and various other neighborhoods have increased. An increasingly popular tourist destination, Detroit receives 19 million visitors per year. In 2015, Detroit was named a "City of Design" by UNESCO, the first U.S. city to receive that designation.
Rochester Hills is a city in Oakland County in the U.S. state of Michigan. As of the 2010 census, the city had a total population of 70,995.The area was originally settled in as early as 1817 and organized as Avon Township in 1835. The city of Rochester incorporated in 1967, and the remaining area of Avon Township was incorporated and renamed as the city of Rochester Hills in 1984. As a northern suburb of Metro Detroit, the city is about 12 miles (19.3 km) north of the city of Detroit.