Duncan, South Carolina

Duncan population, 2020 to 2024

Duncan added 524 residents from July 2020 to July 2024, a change of +12.9%. In the latest year it moved by +139.

Duncan covers 6.62 square miles of land and 0.12 of water, for 694 people per square mile of land. The median South Carolina place of 5,000+ has 1,356, so Duncan is less dense than the typical town.

What county Duncan is in

All of Duncan's residents live in Spartanburg County, which had 369,256 residents in 2024. Duncan holds 1.2% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Duncan

2 ZIP Code Tabulation Areas (ZCTAs) overlap Duncan by at least 10% of the ZCTA's or the town's land: 29334, 29651. 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 Duncan is

The Census internal point of Duncan is at 34.932400, -82.143700. Columbia, the capital, is 90.2 miles SE in a straight line. The nearest larger place is Lyman, SC (6,939 people), 3.2 miles away. The nearest city of 100,000 or more is Charlotte, NC, 76.7 miles away.

Daylight in Duncan

At 34.93° N, Duncan gets about 14 h 30 min of daylight around the June solstice and 9 h 48 min around the December solstice, a swing of 4 h 42 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Duncan

The eight nearest incorporated places of 1,000+ in South Carolina, measured between internal points. The closest is Lyman, 3.1 miles away, with 6,939 people.