The question appears to be asking either whether there is a city called Flint or if the known municipality of Flint, Michigan is considered a city.
As of the last census, Flint, Michigan has a population of 102,434, making it the seventh largest city in Michigan. The population alone would generally place it in the category of "city". It also has several characteristics that are commonly associated with being a city including a fair sized industrial area with large factories, surrounding suburbs, and a large down-town area.
Flint is a city, and thus has no capital.
Flint is a city, and thus has no capital.
The area of Flint is 33.6 square miles.
Oklahoma City is fairly close to halfway between Flint, Michigan and Tucson, Arizona.
Flint, Michigan
Flint
Flint
Flint
180 miles
Snyder, Missouri.
Chicago and Flint, Michigan
In addition to being a proper name (first name or surname), it is the name of a city (Flint, Michigan) and its the name of a character in the Dragon Lance novels, a dwarf named Flint Fireforge.