ZIP code
94028
in Portola Valley, CaliforniaPopulation 6,531
71.01/ 100
Ranked #414 of 32,066 US ZIPs (top 1.3%)
Ranked #68 of 1,719 California ZIPs (top 4.0%)
Ranked #35 of 174 San Francisco-Oakland-Fremont, CA ZIPs (top 20%)
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.
Median household income
$250,001
at the national maximum
Higher is healthier
ST99thUS99thDefinition & source ›
The middle household income in this ZIP — half of households earn more, half earn less — in dollars per year.
Full methodology ›Short sleep
23.2%
in the bottom 0.07% nationally
Lower is healthier
ST1stUS1stDefinition & source ›
The estimated share of adults who usually sleep less than seven hours in a 24-hour period.
Full methodology ›Utility shut-off threat
2.8%
in the bottom 0.3% nationally
Lower is healthier
ST2ndUS1stDefinition & source ›
The estimated share of adults whose household was threatened with a utility shut-off in the past 12 months.
Full methodology ›Housing insecurity
4.9%
in the bottom 0.6% nationally
Lower is healthier
ST1stUS1stDefinition & source ›
The estimated share of adults who experienced housing insecurity in the past 12 months.
Full methodology ›Obesity
21.6%
in the bottom 1.7% nationally
Lower is healthier
ST11thUS2ndDefinition & source ›
The estimated share of adults with obesity, defined as a body-mass index of 30 or higher.
Full methodology ›Food insecurity
5.7%
in the bottom 1.0% nationally
Lower is healthier
ST2ndUS1stDefinition & source ›
The estimated share of adults who experienced food insecurity in the past 12 months.
Full methodology ›Lack of transportation
3.8%
in the bottom 1.0% nationally
Lower is healthier
ST2ndUS1stDefinition & source ›
The estimated share of adults who lacked reliable transportation in the past 12 months.
Full methodology ›Outer-floodplain exposure
13.2%
in the top 2.9% nationally
Lower is healthier
ST92ndUS97thDefinition & 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 ›Cognitive disability
9.0%
in the bottom 2.1% nationally
Lower is healthier
ST3rdUS2ndDefinition & source ›
The estimated share of adults with serious difficulty concentrating, remembering, or making decisions.
Full methodology ›Energy-cost burden
1.1%
in the bottom 1.4% nationally
Lower is healthier
ST7thUS1stDefinition & source ›
The modeled share of household income spent on home energy bills — electricity, gas, and heating fuels.
A modeled share of household income spent on home energy. Estimates that hit the model’s 100% ceiling are suppressed rather than published, because at that point the figure reflects the model’s limit rather than a measured burden.
Full methodology ›The read
In overall standing, Portola Valley, California (ZIP 94028) comes out in the top 1.3% healthiest ZIPs nationally (414th) and the top 4.0% of California (68th).
The profile opens balanced, with readings on either hand: household income rests at the national maximum, modeled short sleep lies in the bottom 0.07% nationally, and modeled utility shutoff sits in the bottom 0.3% nationally. Modeled housing insecurity settles in the bottom 0.6% nationally, obesity registers in the bottom 1.7% nationally, and food insecurity stands in the bottom 1.0% nationally. Modeled transportation lands in the bottom 1.0% nationally, and cognitive disability is in the bottom 2.1% nationally. Modeled energy burden resides in the bottom 1.4% nationally. By contrast, outer-floodplain exposure rests in the top 2.9% nationally.
Relative to the ZIPs around it, outer-floodplain exposure runs far higher than the surrounding ZIPs on this measure. In plain terms, outer-floodplain exposure is land with a lower but real 1-in-500 chance of flooding each year, nicknamed the "500-year floodplain". Energy burden is the share of household income that goes to home energy bills. The nearest healthier ZIP overall is ZIP 94022, just across the boundary. This ZIP further sits on the healthier half of the national range on at least seven of the ten good-life measures tracked here, from quiet and green space to nearby care, a combination reached by about one in twenty-five US ZIP codes.
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 San Francisco-Oakland-Fremont, CA 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 78%
21%
Social Need / SDOH
healthier than 98%
16%
Environmental Hazard
healthier than 75%
14%
Preventive Care
healthier than 95%
13%
Risk Behavior
in the top 0.3%
11%
Mental Health
healthier than 95%
8%
Disability
healthier than 90%
7%
Climate / Disaster Risk
healthier than 90%
5%
Healthcare Access
healthier than 62%
5%
Nothing measured is holding this score back.
Lifting this score
Social Need / SDOH
healthier than 97%
16%
Environmental Hazard
healthier than 85%
14%
Preventive Care
healthier than 99%
13%
Risk Behavior
in the top 0.5%
11%
Mental Health
healthier than 95%
8%
Disability
healthier than 86%
7%
Climate / Disaster Risk
healthier than 77%
5%
About typical
Chronic Disease Burden
healthier than 44%
21%
Holding it back
Healthcare Access
healthier than 40%
5%
Lifting this score
Social Need / SDOH
healthier than 83%
16%
Environmental Hazard
healthier than 71%
14%
Preventive Care
healthier than 98%
13%
Risk Behavior
in the top 0.6%
11%
Mental Health
healthier than 88%
8%
About typical
Disability
healthier than 56%
7%
Climate / Disaster Risk
healthier than 54%
5%
Holding it back
Chronic Disease Burden
healthier than 10%
21%
Healthcare Access
healthier than 20%
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
2 of our published findings list 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.
Above what income predicts
The ZIP codes that outlive their incomes
Estimated life expectancy is 88.9 ± 3.4 years. A median household income of $250,001 predicts 83.7 years — 5.2 years above.
Ranked #49 of the 5,842 ZIP codes this finding names, ordered by years above what income predicts, highest first.
Above its nearby ZIPs
The ZIP codes that outlive their neighbors
Estimated life expectancy is 88.9 ± 3.4 years. The 49 nearest ZIP codes with estimates average 83.1 years — 5.8 years above them.
Ranked #52 of the 3,687 ZIP codes this finding names, ordered by years above the nearby-ZIP average, highest first.
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
94022
Californiashares a border
Score 76.18
Closest healthier
94304
Californiashares a border
Score 74.95
Similar health profile
92067
California99% similar profile
Score 71.38
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 | 27.7% | 24.3–30.8 |
| High blood pressure among adults | 33.9% | 30.1–37.6 |
| Cancer (non-skin) or melanoma among adults | 12.5% | 11.3–13.6 |
| Current asthma among adults | 9.2% | 8.1–10.4 |
| Coronary heart disease among adults | 6.8% | 5.8–7.8 |
| Chronic obstructive pulmonary disease among adults | 4.8% | 3.8–5.9 |
| Depression among adults | 19.8% | 16.9–22.7 |
| Diagnosed diabetes among adults | 9.6% | 8.1–11.1 |
| High cholesterol among adults who have ever been screened | 41.3% | 37.0–45.2 |
| Obesity among adults | 21.6% | 17.1–26.2 |
| Stroke among adults | 3.2% | 2.8–3.7 |
| All teeth lost among adults aged >=65 years | 5.5% | 4.3–6.8 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 3.3% | 2.6–4.1 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 78.4% | 74.9–81.3 |
| Visits to doctor for routine checkup within the past year among adults | 77.1% | 73.8–80.0 |
| Cholesterol screening among adults | 92.3% | 91.1–93.3 |
| Colorectal cancer screening among adults aged 45–75 years | 72.9% | 68.8–76.7 |
| Visited dentist or dental clinic in the past year among adults | 78.1% | 75.4–80.6 |
| Mammography use among women aged 50-74 years | 80.1% | 73.7–85.4 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 14.3% | 11.9–16.7 |
| Current cigarette smoking among adults | 6.2% | 4.8–7.8 |
| No leisure-time physical activity among adults | 15.4% | 12.3–18.6 |
| Short sleep duration among adults | 23.2% | 19.2–27.4 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 14.1% | 11.6–16.9 |
| Frequent mental distress among adults | 11.5% | 10.0–13.0 |
| Frequent physical distress among adults | 10.8% | 9.2–12.4 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 9.0% | 7.6–10.5 |
| Any disability among adults | 24.8% | 21.0–28.5 |
| Hearing disability among adults | 7.2% | 6.2–8.2 |
| Independent living disability among adults | 5.6% | 4.6–6.8 |
| Mobility disability among adults | 11.8% | 9.6–14.2 |
| Self-care disability among adults | 2.6% | 2.2–3.1 |
| Vision disability among adults | 3.2% | 2.7–3.9 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 19.1% | 16.5–22.2 |
| Food insecurity in the past 12 months among adults | 5.7% | 4.5–7.2 |
| Received food stamps in the past 12 months among adults | 4.6% | 3.6–5.9 |
| Housing insecurity in the past 12 months among adults | 4.9% | 4.0–6.0 |
| Lack of reliable transportation in the past 12 months among adults | 3.8% | 3.3–4.5 |
| Loneliness among adults | 29.7% | 25.7–34.1 |
| Utility services shut-off threat in the past 12 months among adults | 2.8% | 2.3–3.3 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | CA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 4.4% | 10.6% (3.1–25.8%) n=32,364 | 10.6% (4.1–24.9%) n=1,714 |
| Uninsured 18–64 | 6.8% | 9.0% (1.5–24.3%) n=32,286 | 7.7% (1.7–17.9%) n=1,704 |
| No HS diploma (25+) | 5.1% | 7.9% (1.8–20.7%) n=32,505 | 9.8% (1.4–30.9%) n=1,729 |
| Bachelor's or higher (25+) | 82.9% | 23.3% (9.2–53.6%) n=32,505 | 31.3% (9.9–68.2%) n=1,729 |
| Unemployment rate (16+) | 4.3% | 3.9% (0.0–9.8%) n=32,274 | 6.1% (0.8–12.0%) n=1,714 |
| Households without a vehicle | 2.7% | 3.9% (0.0–12.5%) n=32,322 | 4.5% (0.0–12.2%) n=1,708 |
| Broadband subscription | 97.5% | 89.3% (75.1–97.1%) n=32,322 | 93.4% (82.1–98.4%) n=1,708 |
| Housing cost burden (≥30% income) | 30.5% | 23.7% (10.6–40.0%) n=32,322 | 38.6% (24.4–50.5%) n=1,708 |
| Homeownership rate | 81.9% | 78.7% (51.7–94.0%) n=32,322 | 64.1% (31.9–86.4%) n=1,708 |
| Crowded housing (>1 per room) | 2.3% | 1.3% (0.0–6.3%) n=32,322 | 4.8% (0.0–15.9%) n=1,708 |
| Foreign-born population | 17.7% | 2.6% (0.0–18.6%) n=32,553 | 18.9% (3.0–40.4%) n=1,730 |
| Single-parent households | 67.5% | 53.6% (37.3–74.1%) n=32,087 | 48.4% (35.1–72.3%) n=1,692 |
| Population 65+ | 39.7% | 19.4% (10.8–33.6%) n=32,553 | 17.0% (9.7–35.7%) n=1,730 |
| Median age | 57.2 yr | 42.2 yr (33.0–56.3) n=32,292 | 40.1 yr (31.8–57.0) n=1,712 |
| Median household income | $250,001 | $72,070 ($46,039–$118,707) n=30,318 | $93,448 ($54,188–$159,562) n=1,584 |
| Median home value | $2,000,001 | $222,200 ($100,300–$579,820) n=30,049 | $659,800 ($300,520–$1,493,340) n=1,593 |
| Median gross rent | $3,501 | $1,021 ($677–$1,912) n=25,670 | $1,912 ($1,113–$2,923) n=1,461 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | CA median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 88.9 yr ± 1.76 | 78.9 yr (74.7–82.8) n=31,308 | 80.5 yr (76.7–83.8) n=1,665 |
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 1.76 years of 88.9, 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