what county is brookfield missouri in
Sponsored Topics. Brookfield is a city in Linn County, Missouri, United States. The population was 4,542 at the 2010 census. Brookfield is located at 39Â°46â²59â³N 93Â°4â²26â³W / 39.78306Â°N 93.07389Â°W / 39.78306; -93.07389 (39.783155, -93.073871). According to the United States Census Bureau, the city has a total area of 4.3 square miles (11.1 kmÂ²), all of it land.