Duval County is located in Northeast Florida bordering the Atlantic Ocean and Nassau, Baker, Clay and St. Johns Counties. Best known for it’s largest city, Jacksonville which lies along the St. Johns River.
Duval County was established in 1822 from St. Johns County and was named for William Pope Duval, first territorial governor of Florida. The area that is now Duval County was home to Native Americans for thousands of years and contains the Timucuan Ecological and Historic Preserve. Duval County Businesses & Related Content Region: Northeast Florida Region Metro Area: Jacksonville, Florida Metro Area County Seat: Jacksonville 
Localities in Duval County, FL Atlantic Beach Baldwin Jacksonville Jacksonville Beach Neptune Beach