ZIP code
21758
in Knoxville, MarylandPopulation 4,409
59.86/ 100
Ranked #4,965 of 32,066 US ZIPs (top 15%)
Ranked #199 of 458 Maryland ZIPs (top 43%)
Ranked #195 of 308 Washington-Arlington-Alexandria, DC-VA-MD-WV ZIPs (bottom 37%)
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.
Independent-living disability
6.0%
in the bottom 9.2% nationally
Lower is healthier
ST29thUS9thDefinition & source ›
The estimated share of adults who have difficulty doing errands alone, such as visiting a doctor’s office, because of a physical, mental, or emotional condition.
Full methodology ›Vision disability
3.4%
in the bottom 8.6% nationally
Lower is healthier
ST25thUS9thDefinition & source ›
The estimated share of adults who are blind or have serious difficulty seeing even with glasses.
Full methodology ›The read
Judged by its overall standing, Knoxville, Maryland (ZIP 21758) sits in the top 15% healthiest ZIPs nationally (4,965th) and the top 43% of Maryland (199th).
A few measures carry most of this area's good news: modeled independent living disability lands in the bottom 9.2% nationally, modeled transportation rests in the bottom 12.4% nationally, and park land settles in the top 13.1% nationally. Lead in tap water lands in the bottom 13.3% nationally, modeled mobility disability rests in the bottom 12.5% nationally, and modeled food insecurity settles in the bottom 14.8% nationally. Modeled vision disability lands in the bottom 8.6% nationally, and cognitive disability rests in the bottom 14.4% nationally. Modeled fair or poor health settles in the bottom 14.2% nationally. Set against that, unemployment lands in the top 13.7% nationally.
Placed beside its immediate neighbors, park land runs far higher than the surrounding ZIPs on this measure. Put plainly, lead in tap water is the EPA trigger, 15 parts per billion in tap samples, above which a water system must act on lead. A healthier nearby ZIP overall is ZIP 20132, just across the boundary.
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 Washington-Arlington-Alexandria, DC-VA-MD-WV 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 69%
21%
Social Need / SDOH
healthier than 73%
16%
Environmental Hazard
healthier than 72%
14%
Preventive Care
healthier than 81%
13%
Risk Behavior
healthier than 79%
11%
Mental Health
healthier than 73%
8%
Disability
healthier than 88%
7%
About typical
Climate / Disaster Risk
healthier than 41%
5%
Holding it back
Healthcare Access
healthier than 37%
5%
Lifting this score
Environmental Hazard
healthier than 61%
14%
Risk Behavior
healthier than 60%
11%
Disability
healthier than 67%
7%
About typical
Chronic Disease Burden
healthier than 56%
21%
Social Need / SDOH
healthier than 48%
16%
Preventive Care
healthier than 51%
13%
Mental Health
healthier than 46%
8%
Holding it back
Climate / Disaster Risk
healthier than 25%
5%
Healthcare Access
healthier than 30%
5%
Lifting this score
Environmental Hazard
healthier than 74%
14%
About typical
Preventive Care
healthier than 57%
13%
Risk Behavior
healthier than 43%
11%
Disability
healthier than 52%
7%
Holding it back
Chronic Disease Burden
healthier than 31%
21%
Social Need / SDOH
healthier than 29%
16%
Mental Health
healthier than 32%
8%
Climate / Disaster Risk
healthier than 19%
5%
Healthcare Access
healthier than 23%
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 ›
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
20132
Virginiashares a border
Score 67.61
Closest healthier
20180
Virginiashares a border
Score 65.25
Similar health profile
21085
Maryland99% similar profile
Score 58.86
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 | 28.5% | 26.7–30.3 |
| High blood pressure among adults | 35.5% | 33.4–37.6 |
| Cancer (non-skin) or melanoma among adults | 9.5% | 8.9–10.2 |
| Current asthma among adults | 10.0% | 9.1–10.8 |
| Coronary heart disease among adults | 5.9% | 5.4–6.4 |
| Chronic obstructive pulmonary disease among adults | 6.1% | 5.4–6.8 |
| Depression among adults | 21.7% | 19.7–23.6 |
| Diagnosed diabetes among adults | 10.9% | 9.9–11.9 |
| High cholesterol among adults who have ever been screened | 39.1% | 36.8–41.2 |
| Obesity among adults | 34.9% | 31.7–37.9 |
| Stroke among adults | 3.0% | 2.8–3.3 |
| All teeth lost among adults aged >=65 years | 9.4% | 8.2–10.7 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 6.5% | 5.5–7.6 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 77.1% | 75.0–78.9 |
| Visits to doctor for routine checkup within the past year among adults | 79.4% | 77.4–81.3 |
| Cholesterol screening among adults | 90.4% | 89.3–91.4 |
| Colorectal cancer screening among adults aged 45–75 years | 68.7% | 66.3–71.1 |
| Visited dentist or dental clinic in the past year among adults | 68.5% | 66.6–70.5 |
| Mammography use among women aged 50-74 years | 77.5% | 74.0–80.8 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 15.4% | 13.7–17.0 |
| Current cigarette smoking among adults | 10.8% | 9.4–12.3 |
| No leisure-time physical activity among adults | 21.1% | 18.9–23.3 |
| Short sleep duration among adults | 35.9% | 33.4–38.6 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 15.1% | 13.5–16.7 |
| Frequent mental distress among adults | 15.1% | 13.7–16.4 |
| Frequent physical distress among adults | 11.6% | 10.5–12.7 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 11.6% | 10.4–12.7 |
| Any disability among adults | 24.6% | 22.4–26.8 |
| Hearing disability among adults | 6.1% | 5.6–6.6 |
| Independent living disability among adults | 6.0% | 5.4–6.7 |
| Mobility disability among adults | 10.7% | 9.6–11.8 |
| Self-care disability among adults | 2.9% | 2.6–3.2 |
| Vision disability among adults | 3.4% | 3.1–3.8 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 22.4% | 20.2–24.7 |
| Food insecurity in the past 12 months among adults | 9.3% | 8.0–10.7 |
| Received food stamps in the past 12 months among adults | 6.9% | 5.8–8.1 |
| Housing insecurity in the past 12 months among adults | 8.8% | 7.7–10.0 |
| Lack of reliable transportation in the past 12 months among adults | 5.4% | 4.7–6.0 |
| Loneliness among adults | 31.8% | 29.1–34.6 |
| Utility services shut-off threat in the past 12 months among adults | 5.6% | 4.9–6.3 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | MD median (p10–p90) |
|---|---|---|---|
| Poverty rate | 5.9% | 10.6% (3.1–25.8%) n=32,364 | 6.7% (1.1–19.3%) n=459 |
| Uninsured 18–64 | 9.7% | 9.0% (1.5–24.3%) n=32,286 | 4.8% (0.0–13.1%) n=459 |
| No HS diploma (25+) | 4.9% | 7.9% (1.8–20.7%) n=32,505 | 6.3% (0.5–16.6%) n=463 |
| Bachelor's or higher (25+) | 43.7% | 23.3% (9.2–53.6%) n=32,505 | 37.3% (15.0–64.4%) n=463 |
| Unemployment rate (16+) | 8.5% | 3.9% (0.0–9.8%) n=32,274 | 3.9% (0.0–8.6%) n=457 |
| Households without a vehicle | 1.9% | 3.9% (0.0–12.5%) n=32,322 | 3.2% (0.0–12.4%) n=457 |
| Broadband subscription | 84.8% | 89.3% (75.1–97.1%) n=32,322 | 93.3% (81.2–100.0%) n=457 |
| Housing cost burden (≥30% income) | 34.3% | 23.7% (10.6–40.0%) n=32,322 | 27.0% (12.0–41.8%) n=457 |
| Homeownership rate | 84.4% | 78.7% (51.7–94.0%) n=32,322 | 82.1% (49.9–98.5%) n=457 |
| Crowded housing (>1 per room) | 2.6% | 1.3% (0.0–6.3%) n=32,322 | 0.7% (0.0–4.0%) n=457 |
| Foreign-born population | 7.9% | 2.6% (0.0–18.6%) n=32,553 | 6.2% (0.0–26.4%) n=464 |
| Single-parent households | 51.7% | 53.6% (37.3–74.1%) n=32,087 | 50.9% (34.0–73.3%) n=450 |
| Population 65+ | 17.7% | 19.4% (10.8–33.6%) n=32,553 | 18.0% (10.9–33.1%) n=464 |
| Median age | 39.0 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.8 yr (34.2–57.2) n=460 |
| Median household income | $111,528 | $72,070 ($46,039–$118,707) n=30,318 | $106,181 ($62,879–$172,423) n=419 |
| Median home value | $424,600 | $222,200 ($100,300–$579,820) n=30,049 | $423,400 ($215,180–$683,660) n=427 |
| Median gross rent | $1,770 | $1,021 ($677–$1,912) n=25,670 | $1,626 ($958–$2,415) n=339 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | MD median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 77.2 yr ± 0.90 | 78.9 yr (74.7–82.8) n=31,308 | 79.5 yr (75.7–82.7) n=451 |
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 0.90 years of 77.2, 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