Brownfield is an unincorporated community in northeastern Laclede County, in the U.S. state of Missouri. The community is located just over one mile southeast of the Laclede-Pulaski county line and one mile east of Missouri Route K. It is within the Mark Twain National Forest and the Gasconade River lies just one mile to the east.
A post office called Brownfield was established in 1930, and remained in operation until 1955. Riley Brownfield, an early postmaster, gave the community his last name.