Novi is a city in Oakland County in the U.S. state of Michigan. A northwestern suburb of Detroit, Novi is located roughly 25 miles north…Novi is a city in Oakland County in the U.S. state of Michigan. A northwestern suburb of Detroit, Novi is located roughly 25 miles northwest of downtown Detroit. As of the 2020 census, the city had a population of 66,243, an increase of 20% from the 2010 census.