Harbor Island, South Carolina

Harbor Island
Map of Fripp Island and Harbor Island CDPs
Harbor Island
Location within South Carolina
Harbor Island
Location within the United States
Coordinates: 32°24′16″N 80°26′13″W / 32.40444°N 80.43694°W / 32.40444; -80.43694
CountryUnited States
StateSouth Carolina
CountyBeaufort
Area
 • Total
1.52 sq mi (3.93 km2)
 • Land1.03 sq mi (2.66 km2)
 • Water0.49 sq mi (1.27 km2)
Elevation
0 ft (0 m)
Population
 (2020)
 • Total
209
 • Density203.5/sq mi (78.58/km2)
Time zoneUTC-5 (Eastern (EST))
 • Summer (DST)UTC-4 (EDT)
ZIP code
29920
Area codes843 and 854
FIPS code45-32172
GNIS feature ID2812934
Websitewww.harborislandoa.com

Harbor Island is a small residential barrier island located 14 miles (22 km) east of Beaufort, South Carolina. It is one of the Carolina Sea Islands. Most of the island is tidal marsh, though approximately 800 acres (3.2 km2) of upland acreage exists on the northeastern portions. The residential portion of the island was listed as a census-designated place in the 2020 census, with a population of 209. The island is served by U.S. Route 21 (US 21), the only vehicular access route to the island and other nearby islands.