Palm City is located at(27.171127, -80.278657).
According to the United States Census Bureau, the CDP has a total area of 16.6 square miles (43 km2), of which 14.6 square miles (38 km2) is land and 2.0 square miles (5.2 km2) (11.76%) is water.
Palm City is an unincorporated town located in Martin County, governed by Board of County Commissioners. Martin County is divided into 5 districts. Palm City is represented by John Haddox as part of District 5. All governmental functions are carried out by the county offices.
Police protection is provided by the Eastern County Operations Division of the Martin County Sheriff's Office. The Sheriff's Office has approximately 250 sworn officers and provides coverage for most of the county. Palm City comprises Patrol Zone 6.
Fire and EMS services are provided by Station 21 of the Martin County Fire Rescue (Engine 21, Rescue 21, Brush 21, Tanker 21, Utility 21)