Question: What Michigan county northwest of Detroit contains a city that is a northern suburb of Detroit?

Context paragraphs:
Omeena County, Michigan: Omeena County was a northwest Michigan county.  It was set off and founded in 1840 from Michilimackinac County.  Its seat was Wequetong, an Indian Camp on the west arm of the Grand Traverse Bay.  In 1851, it was annexed to present-day Grand Traverse County, Michigan.  Later, Wequetong was renamed Traverse City.

List of songs about Detroit: This list of songs about Detroit contains any songs about or involving the city of Detroit.

Lapeer, Michigan: Lapeer is a city in the U.S. state of Michigan and is the county seat of Lapeer County.  As of the 2010 census, the city population was 8,841.  Most of the city was incorporated from land that was formerly in Lapeer Township, though portions were also annexed from Mayfield Township and Elba Township.  The city government is politically independent of all three townships.  Lapeer is in southern Michigan, east of Flint, on the Flint River.  The name "Lapeer" is a corruption of the French "la pierre", which means "the flint".  (See List of Michigan county name etymologies.)

Shelby Charter Township, Michigan: Shelby Charter Township, officially the Charter Township of Shelby, is a charter township and census-designated place located in Macomb County in the U.S. state of Michigan.  The township, a northern suburb of Detroit, is located roughly 15 miles north of the city.  As of the 2000 census, the township had a total population of 65,159.  The 2010 Census places the population at 73,804.  Shelby Charter Township is one of the fastest growing communities in Metro Detroit.

Oak Park, Michigan: Oak Park is a city in south Oakland County of the U.S. state of Michigan.  It is a northern suburb of the city of Detroit, which is located in neighboring Wayne County, and part of its metropolitan area.  As of the 2010 census, the population of Oak Park is 29,319.

Southfield, Michigan: Southfield is a city in Oakland County of the US state of Michigan.  It is a northern suburb of Detroit, MI.  As of the 2010 census, the city had a population of 71,739.  A part of Metro Detroit's upscale office market, the city's marque is a cluster of five golden skyscrapers – known as the "Golden Triangle" – that form the contemporary 2200000 sqft Southfield Town Center office complex with a Westin Hotel and a conference center.  In addition, a 33-story luxury residential high-rise is separate from the complex.  To the west, near the confluence of I-696/Reuther Freeway and M-10/Lodge Freeway, is the American Center.

Oakland County, Michigan: Oakland County is a county in the U.S. state of Michigan, northwest of the Detroit metropolitan area.  As of the 2010 census, its population was 1,202,362, making it the second-most populous county in Michigan, behind neighboring Wayne County.  The county seat is Pontiac.  The county was founded in 1819 and organized in 1820.

Macomb Township, Michigan: Macomb Township is a general law township and northern suburb of Detroit located in Macomb County in the U.S. state of Michigan, in the Metropolitan Detroit region.  The township's population was 50,477 at the 2000 census.  The 2010 Census places the township's population at 79,580, making it Michigan's fastest growing major municipality.

Edward H. McNamara: Edward Howard McNamara   served as Wayne County, Michigan County Executive from 1987–2002, and also served as mayor of Livonia, Michigan, from 1970–1986, and as a member of Livonia City Council from 1962 to 1970.  He is probably best known for overseeing the $1.6 billion expansion of Detroit Metropolitan Wayne County Airport.  The expansion included two new runways and the new Edward H. McNamara Terminal, which was named in his honor.

New Jersey Route 23: Route 23 is a state highway in the northern part of New Jersey in the United States.  The route runs 52.63 mi from County Route 506 (Bloomfield Avenue) and County Route 577 (Prospect Avenue) in Verona, Essex County northwest to the border with New York at Montague Township in Sussex County, where the road continues to Port Jervis, New York as Orange County Route 15.  Route 23 heads through Essex and Passaic Counties as a suburban arterial varying from two to four lanes and becomes a six-lane freeway north of a complex interchange with U.S. Route 46 and Interstate 80 in Wayne.  The freeway carries Route 23 north to a concurrency with U.S. Route 202.  Past the freeway portion, the route heads northwest along the border of Morris and Passaic Counties as a four- to six-lane divided highway with a wide median at places, winding through mountainous areas and crossing Interstate 287 in Riverdale.  The route continues northwest through Sussex County as a mostly two-lane, undivided road that passes through farmland and woodland as well as the communities of Franklin, Hamburg, and Sussex before reaching the New York border just south of an interchange with Interstate 84 near High Point State Park.

Supporting paragraphs: Oak Park, Michigan Oakland County, Michigan
Answer: Oakland County