Population 21,544 · Census ACS 2020–24
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Population and households in Johns Island
Household size in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.41 | 2.61 | 2.54 | 2.68 |
| 2010–14 | 2.75 | 2.62 | 2.59 | 2.73 |
| 2015–19 | 2.42 | 2.63 | 2.57 | 2.71 |
| 2020–24 | 2.44 | 2.51 | 2.50 | 2.65 |
| Change | +0.03 | −0.10 | −0.04 | −0.03 |
The average household in Johns Island has 2.44 people, under the U.S. average of 2.65. That is in line with the rest of the Charleston area. Household size has crept up from 2.41 in 2006–10, even as the national average fell.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 40.8 | 36.2 | 38.3 | 37.7 |
| 2010–14 | 37.5 | 37.1 | 39.3 | 38.6 |
| 2015–19 | 43.5 | 38.5 | 40.6 | 39.6 |
| 2020–24 | 41.7 | 39.2 | 41.2 | 40.1 |
| Change | +0.8 | +3.0 | +2.9 | +2.3 |
Johns Island skews a little older than the country: its median age is 41.7, against 40.1 nationally. Since 2006–10, the median age has crept up from 40.8, in line with the national trend. Residents skew youngest in the north and oldest in the southwest.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.6% | 12.9% | 13.0% | 12.3% |
| 2010–14 | 10.1% | 12.3% | 13.0% | 12.3% |
| 2015–19 | 4.4% | 10.5% | 11.8% | 11.6% |
| 2020–24 | 6.5% | 10.1% | 11.7% | 11.6% |
| Change | −2.1 pts | −2.8 pts | −1.3 pts | −0.6 pts |
Single-parent households are relatively rare in Johns Island: 6.5% of households, against 11.6% nationally. The single-parent share has fallen 2.1 points since 2006–10, a much bigger shift than nationally. Only 15 of the 172 South Carolina cities with 5,000+ people have a lower share of single-parent households.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Johns Island
Renters in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 21.5% | 33.8% | 30.1% | 33.3% |
| 2010–14 | 27.1% | 35.4% | 31.4% | 35.6% |
| 2015–19 | 23.3% | 33.8% | 30.6% | 36.0% |
| 2020–24 | 15.4% | 30.9% | 28.1% | 34.8% |
| Change | −6.1 pts | −2.8 pts | −2.0 pts | +1.5 pts |
Johns Island is largely a place of homeowners: only 15.4% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 24.4% have no mortgage at all, well below the national share of 39.8%. Since 2006–10, the renter share has fallen 6.1 points, even as the national share rose.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 14.0% | 13.5% | 14.2% | 11.4% |
| 2010–14 | 12.1% | 11.6% | 14.2% | 11.4% |
| 2015–19 | 11.5% | 10.7% | 13.3% | 11.1% |
| 2020–24 | 11.8% | 9.9% | 11.8% | 9.6% |
| Change | −2.2 pts | −3.6 pts | −2.5 pts | −1.8 pts |
Vacancy runs a little high in Johns Island: 11.8% of homes are empty, against 9.6% nationally. The count includes vacation homes and homes between owners or tenants, not just abandoned ones. Vacancy is down 2.2 points from 2006–10, in line with the national trend.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 1988 | 1986 | 1984 | 1974 |
| 2010–14 | 1993 | 1987 | 1985 | 1975 |
| 2015–19 | 1999 | 1989 | 1987 | 1977 |
| 2020–24 | 2009 | 1995 | 1991 | 1980 |
| Change | +20 | +9 | +7 | +6 |
Johns Island has newer housing than the country as a whole: the median home was built in 2009, versus 1980 nationally. The median year built has moved up from 1988 in 2006–10, a sign of steady new building. Only one other South Carolina city with 5,000+ people has newer homes.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | $730 | $1,002 | $780 | $965 |
| 2010–14 | $986 | $1,088 | $859 | $1,040 |
| 2015–19 | $1,223 | $1,260 | $984 | $1,213 |
| 2020–24 | $1,581 | $1,767 | $1,294 | $1,571 |
| Change | +$851 | +$765 | +$514 | +$606 |
The median renter in Johns Island pays $1,581 a month for rent and utilities, close to the national median of $1,571. Rents here are lower than in the wider Charleston area ($1,767). Rents are up $851 a month from 2006–10, a 117% jump, faster than rents rose nationally. Rent takes 35.9% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Johns Island
Bachelor's degrees in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 29.5% | 30.2% | 25.2% | 28.4% |
| 2010–14 | 35.8% | 32.6% | 26.5% | 29.6% |
| 2015–19 | 43.3% | 35.9% | 28.9% | 32.1% |
| 2020–24 | 54.9% | 41.2% | 32.6% | 35.6% |
| Change | +25.4 pts | +11.0 pts | +7.4 pts | +7.2 pts |
College graduates are unusually common in Johns Island: 54.9% of adults 25 and older have a bachelor's degree or higher, against 35.6% nationally. Education tends to track local incomes and the kinds of jobs nearby. Since 2006–10, the share with a degree has risen 25.4 points, a much bigger shift than nationally. Only eight of the 172 South Carolina cities with 5,000+ people have a higher share of college graduates.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 81.8% | 87.9% | 84.0% | 84.9% |
| 2010–14 | 87.8% | 89.1% | 85.7% | 86.1% |
| 2015–19 | 93.6% | 90.9% | 87.8% | 87.7% |
| 2020–24 | 94.4% | 92.8% | 90.2% | 89.3% |
| Change | +12.6 pts | +4.8 pts | +6.2 pts | +4.3 pts |
High school completion is high in Johns Island: 94.4% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma has risen 12.6 points since 2006–10, in line with the national trend. Johns Island has a higher share of high school graduates than the great majority of South Carolina cities.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Johns Island
| Period | Johns Island | Charleston area | South Carolina | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.7% | 7.8% | 9.1% | 8.1% |
| 2010–14 | 5.4% | 9.5% | 10.6% | 9.4% |
| 2015–19 | 3.2% | 4.3% | 5.8% | 5.6% |
| 2020–24 | 1.9% | 3.6% | 4.9% | 5.4% |
| Change | −4.8 pts | −4.2 pts | −4.2 pts | −2.7 pts |
Unemployment in Johns Island has been low: just 1.9% of the labor force was out of work and looking, well below the national rate of 5.4%. Only 11 of the 172 South Carolina cities with 5,000+ people have lower unemployment. Unemployment has fallen 4.8 points since 2006–10, in line with the national trend.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Johns Island compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Johns Island | 2.44 | 41.7 | 6.5% | 15.4% | 11.8% | 2009 | $1,581 | 54.9% | 94.4% | 1.9% |
| Fenwick Hills | 3.00 | 38.0 | 13.8% | 15.7% | 11.3% | 2008 | $1,914 | 42.3% | 92.8% | 1.8% |
| Legareville | 2.55 | 58.7 | 4.3% | 17.2% | 20.6% | 2005 | $931 | 55.2% | 99.0% | 0.1% |
| Charleston area | 2.51 | 39.2 | 10.1% | 30.9% | 9.9% | 1995 | $1,767 | 41.2% | 92.8% | 3.6% |
| Red Top | 2.69 | 40.9 | 15.7% | 12.6% | 13.3% | 2004 | $1,839 | 51.8% | 95.7% | 1.4% |
| Wadmalaw Island | 2.50 | 53.3 | 6.3% | 6.3% | 21.4% | 1991 | $1,389 | 47.0% | 93.1% | 1.7% |
| Kiawah Island | 1.92 | 66.9 | 4.7% | 1.1% | 61.7% | 1994 | $1,568 | 87.1% | 99.0% | 2.0% |
| Yonges Island | 2.78 | 39.9 | 13.5% | 10.5% | 25.3% | 1989 | $1,390 | 55.2% | 92.9% | 2.8% |
| Folly Beach | 2.17 | 55.8 | 7.1% | 8.3% | 62.3% | 1990 | $1,807 | 64.3% | 96.8% | 1.9% |
| Ravenel | 2.76 | 42.2 | 12.9% | 11.7% | 10.3% | 2000 | $1,035 | 34.2% | 94.3% | 0.0% |
| Hollywood | 2.44 | 52.6 | 10.3% | 13.8% | 12.5% | 1992 | $1,317 | 33.9% | 86.0% | 4.1% |
All figures 2020–24.
Cities with similar populations: Corinth, TX · Elmwood Park, NJ · Ellijay, GA · Elkridge, MD · Easton, MD · Dyer, IN · DeFuniak Springs, FL · Deerfield, IL · Davidson, NC · Darlington, SC
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Johns Island. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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