HomeSouth CarolinaCharleston CountySullivan's Island
Sullivan's Island, South Carolina: commercial real estate data.
Sullivan's Island is a Census town of 2,087 people across 2.50 square miles of land, in Charleston County. Median household income is $192,813, 85.3 percent of occupied homes are owned, and the SBA record carries 1 7(a) approvals to borrowers here worth $500,000 since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Sullivan's Island
What Sullivan's Island is
- Census place typetown
- Land area2.5 sq mi
- Water area0.94 sq mi
- Population per square mile of land835
- County holding the largest share of its areaCharleston County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Sullivan's Island
How many people live in Sullivan's Island
- Population2,087
- Median age52.5
- Population under 18421 plus or minus 84
- Share under 1820.2 percent
- Population 65 and over588 plus or minus 205
- Share 65 and over28.2 percent plus or minus 8.6
- Households798
- Family households568
- Share of households that are families71.2 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Sullivan's Island
Income and work in Sullivan's Island
- Median household income$192,813
- Per capita income$117,718
- Civilian labor force1,019 plus or minus 302
- Employed1,004 plus or minus 303
- Unemployed15 plus or minus 14
- Unemployment rate1.5 percent plus or minus 1.3
- Adults 25 and over1,608
- Adults 25 and over with a high school diploma or higher99.8 percent plus or minus 24.5
- Adults 25 and over with a bachelor degree or higher84.3 percent plus or minus 21.4
- Adults 25 and over with a graduate degree44.7 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Sullivan's Island
Housing in Sullivan's Island
- Housing units1,088
- Occupied units798
- Vacant units290 plus or minus 75
- Vacancy rate26.7 percent plus or minus 6.0
- Owner occupied681
- Renter occupied117 plus or minus 50
- Ownership rate85.3 percent
- Median owner-occupied home value$2,000,001
- Median gross rent, monthly$2,375 plus or minus $1,762
- Annual rent as a share of median income14.8 percent plus or minus 11.3
- Single family units992
- Share single family91.2 percent
- Units in buildings of two or more87 plus or minus 61
- Share in buildings of two or more8.0 percent plus or minus 5.5
- Mobile homes9 plus or minus 14
- Median year structure built1981
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Sullivan's Island
How Sullivan's Island gets to work
- Workers 16 and over who commute858 plus or minus 315
- Commuting under 15 minutes341 plus or minus 118
- Share commuting under 15 minutes39.7 percent plus or minus 20.1
- Commuting 30 minutes or more151 plus or minus 103
- Share commuting 30 minutes or more17.6 percent plus or minus 10.1
- Drove alone80.9 percent plus or minus 19.5
- Carpooled0.0 percent
- Public transport0.0 percent
- Walked1.9 percent plus or minus 1.8
- Worked from home14.2 percent plus or minus 6.0
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Sullivan's Island
SBA loans in Sullivan's Island (7(a))
- Approvals1
- Gross approval$500,000
- Average approval$500,000
- Median approval$500,000
- Largest approval$500,000
- Jobs supported50
- Jobs per approval50.0
- Loans with a final outcome0
- Paid in full0
- Charged off0
- Median term120 months
- Share on real estate terms of 20 years or more0.0 percent
- Share to franchises0.0 percent
- Distinct lenders1
- Distinct industries by NAICS1
Counted by borrower city: approvals to borrowers whose address is in Sullivan's Island, in any county, FY2020 to FY2026. Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Sullivan's Island
SBA loans in Sullivan's Island (504)
- Approvals1
- Gross approval$1,357,000
- Average approval$1,357,000
- Median approval$1,357,000
- Largest approval$1,357,000
- Jobs supported21
- Loans with a final outcome0
- Charged off0
- Median term240 months
- Distinct CDCs1
Counted by borrower city: approvals to borrowers whose address is in Sullivan's Island, in any county, FY2010 to FY2026. Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
Sullivan's Island
Flood risk in Sullivan's Island
- NFIP communityTown of Sullivans Island
- NFIP community number455418
- Participating in the NFIPYes
- Community Rating System classClass 5
- Currently effective map date01/29/21
The Town of Sullivans Island participates in the National Flood Insurance Program as community 455418 and carries Community Rating System class 5, a flood insurance premium discount for policies written there.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
Charleston County, not Sullivan's Island
Charleston County context, not Sullivan's Island figures
- Establishments in Charleston County15,801
- Covered employment, Charleston County278,476
- Average annual pay, Charleston County$68,271
- Housing units permitted, Charleston County4,153
Every figure in this section is published for Charleston County as a whole and is not a measurement of Sullivan's Island.
All Charleston County figures →
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
Sullivan's Island questions, answered from the record.
How many people live in Sullivan's Island, South Carolina?
2,087, in 798 households. Sullivan's Island town covers 2.50 square miles of land, which is 835 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Sullivan's Island in?
Charleston County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in Sullivan's Island?
$192,813. The median owner-occupied home is valued at $2,000,001. Median gross rent is $2,375 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to Sullivan's Island businesses?
1 7(a) approvals totaling $500,000 since FY2020, across 1 lenders, median approval $500,000, plus 1 504 approvals worth $1.4 m since FY2010. These count approvals to borrowers whose address is in Sullivan's Island, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to Sullivan's Island borrowers get paid back?
No rate is published for Sullivan's Island. Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published. The counts are shown instead.
Is Sullivan's Island in the National Flood Insurance Program?
Yes. Sullivan's Island appears in the FEMA Community Status Book as Sullivans Island, town of, community 455418, carrying Community Rating System class 5, which is a premium discount for exceeding the program minimum. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page Sullivan's Island figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for Charleston County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Sullivan's Island.
Is zoning published for Sullivan's Island?
No. Nothing on this page presents parcel level zoning.