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.
Defined Inspections provides radon testing in Royal Oak for $100 per 48-hour continuous monitoring test.