Greenfield is a city in Dade County, Missouri. The population was 1,358 at the 2000 census. It is the county seat of Dade County.
The Greenfield square is lined with buildings built in the 1880s out of bricks made in the Greenfield Brickyard. The Opera House, which opened in 1888, is known as the "Jewel of the Square" and is still used for the summer productions of the Dade County Community Theater.
Greenfield is located at 37°24′55″N 93°50′34″W / 37.41528°N 93.84278°W / 37.41528; -93.84278 (37.415340, -93.842781). According to the United States Census Bureau, the city has a total area of 1.1 square miles (2.8 km²), all of it land.