Sullivan's Island, South Carolina

Sullivan's Island population, 2020 to 2024

Sullivan's Island added 52 residents from July 2020 to July 2024, a change of +2.7%. In the latest year it moved by +18.

Sullivan's Island covers 2.50 square miles of land and 0.94 of water, for 779 people per square mile of land. The median South Carolina place of 5,000+ has 1,356, so Sullivan's Island is less dense than the typical town.

What county Sullivan's Island is in

All of Sullivan's Island's residents live in Charleston County, which had 431,001 residents in 2024. Sullivan's Island holds 0.5% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Sullivan's Island

1 ZIP Code Tabulation Area (ZCTA) overlaps Sullivan's Island by at least 10% of the ZCTA's or the town's land: 29482. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a town that annexed land after 2020 may reach into ZIP codes not listed here.

Where Sullivan's Island is

The Census internal point of Sullivan's Island is at 32.770900, -79.831100. Columbia, the capital, is 109.8 miles NW in a straight line. The nearest larger place is Mount Pleasant, SC (95,604 people), 3.2 miles away. The nearest city of 100,000 or more is Charleston, SC, 9.1 miles away.

Daylight in Sullivan's Island

At 32.77° N, Sullivan's Island gets about 14 h 19 min of daylight around the June solstice and 10 h 00 min around the December solstice, a swing of 4 h 19 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Sullivan's Island

The eight nearest incorporated places of 1,000+ in South Carolina, measured between internal points. The closest is Mount Pleasant, 3.3 miles away, with 95,604 people.