ZIP code
29455
in Johns Island, South CarolinaPopulation 27,576
64.11/ 100
Ranked #2,391 of 32,066 US ZIPs (top 7.5%)
Ranked #17 of 417 South Carolina ZIPs (top 4.1%)
Ranked #8 of 45 Charleston-North Charleston, SC ZIPs (top 18%)
Ranks are modeled estimates — ZIPs a few hundred places apart are effectively tied.
What defines this ZIP
Metrics where this ZIP sits in the tails of the national distribution — the ones that most set it apart. Select any tile for its definition and methodology.
Natural-disaster risk
in the top 2.0% nationally
Lower is healthier
ST98thUS98thDefinition & source ›
This area’s national rank on its single highest non-flood natural hazard — such as wildfire, tornado, or earthquake — in FEMA’s modeled National Risk Index; flooding is shown separately.
Full methodology ›Outer-floodplain exposure
19.2%
in the top 2.0% nationally
Lower is healthier
ST99thUS98thDefinition & source ›
The share of this ZIP’s land area inside FEMA’s 0.2%-annual-chance flood band — the “500-year” zone, a lower but real 1-in-500 yearly chance.
Measured from FEMA’s mapped flood panels. Where a panel has not been mapped, no value is published for that ZIP — those ZIPs are absent from this comparison rather than counted as unexposed.
Full methodology ›Colon-cancer screening
77.4%
in the top 0.9% nationally
Higher is healthier
ST98thUS99thDefinition & source ›
The estimated share of adults aged 45–75 who are up to date on colorectal-cancer screening.
Full methodology ›Floodplain exposure
59.7%
in the top 2.6% nationally
Lower is healthier
ST95thUS97thDefinition & source ›
The share of this ZIP’s land area inside FEMA’s 1%-annual-chance floodplain — the “100-year” flood zone, where flooding has about a 1-in-100 chance in any given year.
Measured from FEMA’s mapped flood panels. Where a panel has not been mapped, no value is published for that ZIP — those ZIPs are absent from this comparison rather than counted as unexposed.
Full methodology ›PFOA in drinking water
99.5%
in the top 3.8% nationally
Lower is healthier
ST92ndUS96thDefinition & source ›
The share of residents served by public water systems where PFOA, one of the man-made “forever chemicals,” was detected in EPA testing.
Measured from EPA records for the public water systems that serve this ZIP. Households on private wells — roughly 30% of the US population — are not covered by this measure, and this figure says nothing about their water.
Full methodology ›Binge drinking
20.7%
in the top 3.9% nationally
Lower is healthier
ST95thUS96thDefinition & source ›
The estimated share of adults who report binge drinking — five or more drinks on one occasion for men, four or more for women.
Full methodology ›PFOS in drinking water
99.5%
in the top 4.2% nationally
Lower is healthier
ST92ndUS96thDefinition & source ›
The share of residents served by public water systems where PFOS, one of the most common “forever chemicals,” was detected in EPA testing.
Measured from EPA records for the public water systems that serve this ZIP. Households on private wells — roughly 30% of the US population — are not covered by this measure, and this figure says nothing about their water.
Full methodology ›Expected annual disaster loss
$0
in the top 4.6% nationally
Lower is healthier
ST94thUS95thDefinition & source ›
FEMA’s modeled estimate, in dollars per year, of the average harm to people expected from natural hazards — an annualized average, not a forecast for any single year.
Full methodology ›Loneliness
27.7%
in the bottom 5.9% nationally
Lower is healthier
ST7thUS6thDefinition & source ›
The estimated share of adults who report feeling lonely.
Full methodology ›Short sleep
29.2%
in the bottom 6.5% nationally
Lower is healthier
ST4thUS6thDefinition & source ›
The estimated share of adults who usually sleep less than seven hours in a 24-hour period.
Full methodology ›The read
Overall, Johns Island, South Carolina (ZIP 29455) places in the top 7.5% healthiest ZIPs nationally (2,391st) and the top 4.1% of South Carolina (17th).
The measures land in both directions, and neither dominates: modeled colon screening settles in the top 0.9% nationally, and loneliness sits in the bottom 5.9% nationally. Modeled short sleep lies in the bottom 6.5% nationally. Pulling the other way, modeled disaster risk rests in the top 2.0% nationally, outer-floodplain exposure resides in the top 2.0% nationally, and floodplain exposure is in the top 2.6% nationally. PFOA in drinking water lands in the top 3.8% nationally, modeled binge drinking stands in the top 3.9% nationally, and PFOS in drinking water registers in the top 4.2% nationally. Modeled expected annual loss settles in the top 4.6% nationally.
Beside the areas that surround it, outer-floodplain exposure runs far higher than the surrounding ZIPs on this measure. For readers new to these terms, disaster risk is the area's national rank on its highest non-flood peril in FEMA's modeled Risk Index, like wildfire or quake. PFOA in drinking water is one of the man-made "forever chemicals" that build up in the body and environment instead of breaking down. PFOS in drinking water is a common one of the man-made "forever chemicals" that build up in the body and environment instead of breaking down. Among nearby ZIPs, the nearest healthier one overall is ZIP 29439, about 1.2 miles away.
What’s driving this score
Nine domains make up the ZipVitals Score — here is how this ZIP does on each, and how much each one counts. Compare it against the US, this state and the Charleston-North Charleston, SC metro area.
Compared with the ZIP codes measured across all nine scoring domains — not with all US ZIP codes.
Lifting this score
Chronic Disease Burden
healthier than 80%
21%
Social Need / SDOH
healthier than 94%
16%
Environmental Hazard
healthier than 91%
14%
Preventive Care
healthier than 95%
13%
Risk Behavior
healthier than 81%
11%
Mental Health
healthier than 88%
8%
Disability
healthier than 87%
7%
Healthcare Access
healthier than 88%
5%
Holding it back
Climate / Disaster Risk
healthier than 7%
5%
Lifting this score
Chronic Disease Burden
healthier than 89%
21%
Social Need / SDOH
healthier than 95%
16%
Environmental Hazard
healthier than 85%
14%
Preventive Care
healthier than 94%
13%
Risk Behavior
healthier than 90%
11%
Mental Health
healthier than 94%
8%
Disability
healthier than 94%
7%
Healthcare Access
healthier than 88%
5%
Holding it back
Climate / Disaster Risk
healthier than 10%
5%
Lifting this score
Chronic Disease Burden
healthier than 68%
21%
Social Need / SDOH
healthier than 84%
16%
Environmental Hazard
healthier than 73%
14%
Preventive Care
healthier than 84%
13%
Risk Behavior
healthier than 80%
11%
Mental Health
healthier than 82%
8%
Disability
healthier than 77%
7%
Healthcare Access
healthier than 91%
5%
Holding it back
Climate / Disaster Risk
healthier than 34%
5%
“Share” is how much of this ZIP’s score the domain accounts for. Percentages are rounded; higher is healthier in every domain. How the score works, and who it compares you with ›
Findings that name this ZIP
One of our published findings lists this ZIP code. Each finding compares one published measure against a stated benchmark, and names only the ZIP codes whose estimates are reliable enough to rank. See all surprising findings.
Below what income predicts
The ZIP codes that outlive their incomes
Estimated life expectancy is 78.9 ± 1.1 years. A median household income of $121,372 predicts 80.8 years — 2.0 years below.
Ranked #2,564 of the 5,842 ZIP codes this finding names, ordered by years above what income predicts, highest first.
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
29407
South Carolinashares a border
Score 59.68
Closest healthier
29439
South Carolinaabout 1.2 mi away
Score 66.04
Similar health profile
65039
Missouri99% similar profile
Score 60.94
How these were chosen: only ZIPs with a published Score appear — a nearby ZIP with too little data to score won’t. Nearby means closest by distance between ZIP boundaries, which can cross state lines. A similar health profile is a close match across the nine Score domains, not similar demographics. Distances are measured between ZIP boundaries — ZIPs that touch share a border. How distance is measured
Evidence
Every measure this page draws on, by source. Collapsed by default — the full data stays in the page for search engines either way.
Health OutcomesCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Arthritis among adults | 27.4% | 24.9–29.9 |
| High blood pressure among adults | 33.4% | 30.5–36.3 |
| Cancer (non-skin) or melanoma among adults | 10.3% | 9.4–11.1 |
| Current asthma among adults | 8.5% | 7.6–9.5 |
| Coronary heart disease among adults | 5.8% | 5.2–6.4 |
| Chronic obstructive pulmonary disease among adults | 5.5% | 4.9–6.3 |
| Depression among adults | 20.7% | 18.2–23.3 |
| Diagnosed diabetes among adults | 11.5% | 10.1–12.9 |
| High cholesterol among adults who have ever been screened | 38.9% | 35.8–41.9 |
| Obesity among adults | 28.7% | 24.8–32.6 |
| Stroke among adults | 3.2% | 3.0–3.5 |
| All teeth lost among adults aged >=65 years | 6.3% | 5.1–7.6 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 8.8% | 7.5–10.3 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 81.6% | 79.1–83.8 |
| Visits to doctor for routine checkup within the past year among adults | 80.8% | 78.1–83.2 |
| Cholesterol screening among adults | 90.2% | 88.8–91.3 |
| Colorectal cancer screening among adults aged 45–75 years | 77.4% | 74.0–80.4 |
| Visited dentist or dental clinic in the past year among adults | 70.6% | 67.8–73.1 |
| Mammography use among women aged 50-74 years | 80.0% | 74.5–84.7 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 20.7% | 17.9–23.4 |
| Current cigarette smoking among adults | 9.3% | 7.9–10.9 |
| No leisure-time physical activity among adults | 18.6% | 15.9–21.2 |
| Short sleep duration among adults | 29.2% | 25.6–32.9 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 14.0% | 12.3–15.9 |
| Frequent mental distress among adults | 13.1% | 11.5–14.6 |
| Frequent physical distress among adults | 11.1% | 9.8–12.4 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 10.6% | 9.3–12.0 |
| Any disability among adults | 24.4% | 21.5–27.3 |
| Hearing disability among adults | 6.2% | 5.5–6.9 |
| Independent living disability among adults | 6.1% | 5.4–6.8 |
| Mobility disability among adults | 11.7% | 10.2–13.1 |
| Self-care disability among adults | 3.0% | 2.7–3.3 |
| Vision disability among adults | 3.8% | 3.5–4.2 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 19.4% | 17.1–22.1 |
| Food insecurity in the past 12 months among adults | 9.9% | 8.5–11.5 |
| Received food stamps in the past 12 months among adults | 5.4% | 4.6–6.4 |
| Housing insecurity in the past 12 months among adults | 8.4% | 7.3–9.7 |
| Lack of reliable transportation in the past 12 months among adults | 5.5% | 4.9–6.3 |
| Loneliness among adults | 27.7% | 24.5–31.2 |
| Utility services shut-off threat in the past 12 months among adults | 5.5% | 4.9–6.4 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | SC median (p10–p90) |
|---|---|---|---|
| Poverty rate | 9.0% | 10.6% (3.1–25.8%) n=32,364 | 15.5% (6.2–28.7%) n=410 |
| Uninsured 18–64 | 7.7% | 9.0% (1.5–24.3%) n=32,286 | 14.1% (5.9–25.5%) n=412 |
| No HS diploma (25+) | 4.7% | 7.9% (1.8–20.7%) n=32,505 | 11.6% (3.4–21.1%) n=417 |
| Bachelor's or higher (25+) | 59.5% | 23.3% (9.2–53.6%) n=32,505 | 20.1% (9.1–48.9%) n=417 |
| Unemployment rate (16+) | 1.5% | 3.9% (0.0–9.8%) n=32,274 | 4.6% (0.2–11.1%) n=414 |
| Households without a vehicle | 2.4% | 3.9% (0.0–12.5%) n=32,322 | 4.8% (0.0–13.6%) n=410 |
| Broadband subscription | 95.3% | 89.3% (75.1–97.1%) n=32,322 | 86.1% (71.4–95.1%) n=410 |
| Housing cost burden (≥30% income) | 25.9% | 23.7% (10.6–40.0%) n=32,322 | 23.3% (12.8–35.0%) n=410 |
| Homeownership rate | 88.2% | 78.7% (51.7–94.0%) n=32,322 | 77.3% (54.9–91.8%) n=410 |
| Crowded housing (>1 per room) | 2.8% | 1.3% (0.0–6.3%) n=32,322 | 1.4% (0.0–4.6%) n=410 |
| Foreign-born population | 6.4% | 2.6% (0.0–18.6%) n=32,553 | 2.7% (0.0–9.0%) n=419 |
| Single-parent households | 69.9% | 53.6% (37.3–74.1%) n=32,087 | 50.9% (37.6–69.9%) n=404 |
| Population 65+ | 25.7% | 19.4% (10.8–33.6%) n=32,553 | 19.6% (10.9–31.7%) n=419 |
| Median age | 49.8 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.4 yr (33.8–54.1) n=415 |
| Median household income | $121,372 | $72,070 ($46,039–$118,707) n=30,318 | $58,990 ($40,800–$90,964) n=384 |
| Median home value | $590,800 | $222,200 ($100,300–$579,820) n=30,049 | $177,400 ($88,260–$384,940) n=383 |
| Median gross rent | $1,567 | $1,021 ($677–$1,912) n=25,670 | $950 ($678–$1,545) n=343 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | SC median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 78.9 yr ± 0.54 | 78.9 yr (74.7–82.8) n=31,308 | 76.3 yr (73.2–79.9) n=389 |
About the ± — it’s this estimate’s give-or-take (statisticians call it the standard error). The true life expectancy for this ZIP most likely falls within 0.54 years of 78.9, and it’s very unlikely to be off by more than twice that.
More ZIPs to explore ▾More ZIPs to explore ▴
How these lists were built: they draw only from ZIPs that have a published Score, so ZIPs with too little data to score are not listed. Distance-based lists use distance between ZIP boundaries with no state filter, so an out-of-state ZIP can appear. Statistically similar means a close match across the nine Score domains, not a demographic match: the measure is the cosine similarity between two ZIPs’ domain scores, taken over the domains both ZIPs have data for and only where that overlap covers at least six of the nine — and where no ZIP clears that minimum-overlap floor, that list is left out rather than filled with a weak match. How distance is measured