Baldwin is a town in Duval County, Florida, United States. When the majority of communities in Duval County were consolidated with the city of Jacksonville in 1968, Baldwin, along with Jacksonville Beach, Atlantic Beach and Neptune Beach, remained partly independent. Like the other towns, it maintains its own municipal government, but its residents vote in the Jacksonville mayoral election and vote for the Jacksonville City Council; unlike the others, Baldwin no longer supports its own police force. The population was 1,396 at the 2020 census.

Duval County is in the northeastern part of the U.S. state of Florida. As of July 2022, the population was 1,016,536, up from 864,263 in 2010. It is Florida's sixth-most populous county. Its county seat is Jacksonville, with which the Duval County government has been consolidated since 1968. Duval County was established in 1822, and is named for William Pope Duval, Governor of Florida Territory from 1822 to 1834. Duval County is the central county of the Jacksonville Metropolitan Statistical Area.