On CDC estimates, Alto is healthier than 96% of U.S. towns
Alto differs from California on 20 of 32 measures CDC estimates: 19 better, 1 worse.
Modeled estimates for adults 18+, CDC’s own estimate for Alto. How CDC estimates town health
What stands out about health in Alto
Alto is an active town
Only 14.9% of adults get no exercise outside work, vs 24.6% across California. Habits ↓
Cancer runs high in Alto
1 in 11 adults have had cancer (8.8%), vs 6.4% across California. Conditions ↓
Nearly everyone in Alto is insured
Only 3.6% of adults 18–64 have no health insurance, vs 10.6% across California. Checkups ↓
Written from the CDC, Medicare and HRSA data on this page. CDC PLACES 2025 release: modeled estimates for adults, not counts; “higher” and “lower” mean the California figure falls outside Alto’s likely range.
What’s behind Alto’s grade
On seven CDC estimates for adults, Alto is healthier than 96% of U.S. towns. All seven estimates beat the typical U.S. town. The strongest is obesity (fewer adults with obesity than almost every town); the weakest is mental distress, still better than 81%.
Health estimates follow income closely across the country: towns with higher household incomes usually score higher (a correlation of 0.77 across 21,157 graded towns). Alto’s median household income is $129,191; among the 4,640 U.S. towns within 25% of that ($97K–$161K), it’s healthier than 92%, about where its income would put it.
Everyday habits, side by side with California
Share of adults, with the California figure marked.
Walk with neighbors
The easiest exercise habit to keep is one with company.
Out of every 100 Alto adults…
Alto runs below CA on 5 of 12 conditions and above it on 1. Tap one to see it as people.
Only 10% of Alto residents are 65 or older, vs 16% across California. Heart disease, stroke and diabetes run low partly because the town is young.
Keeping up with care
Share of Alto adults getting routine care. The full ring is 100%; the dark tick marks California.
Care in and near Alto
No hospital or community health center in Alto itself. These are the nearest.
Hospitals: Medicare overall star ratings, 1–5. Community health centers charge on a sliding scale by income. Distances are straight-line from the center of Alto; ≈ marks a hospital located by its town, not its street. Shortage areas: HRSA Health Professional Shortage Areas.
How Alto adults are doing
On 2 of 4 measures, Alto does better than California.
3 in 10 Alto adults feel lonely. A hello is a start.
Groups are the easiest way in: a walking group, a book club, your street.
If you or someone you know is struggling, call or text 988, the Suicide & Crisis Lifeline. It’s free, confidential and open 24/7.
Making ends meet
Needs that shape health as much as any doctor visit: food, housing, utilities and a way to get around.
6.7% of Alto adults receive SNAP (food stamps), compared with 15.6% across California.
Alto and the towns around it
Alto’s Health Grade ranks 3rd of 3 graded towns around it.
Nearby towns are shaded from CDC’s estimates for their ZIP codes, or CDC’s own figure for cities and villages.
Health next door
| Town | Health | Obesity | Diabetes | Smoking | Figures from |
|---|---|---|---|---|---|
| Alto | A+ | 21.8% | 8.3% | 8.4% | CDC place |
| Mill Valley | A+ | 19.8% | 8.9% | 6.6% | CDC place |
| Strawberry | A+ | 19.6% | 9.1% | 6.6% | CDC place |
Same-state neighbors only, ordered by length of shared border.
Living with a disability
Shown without a better/worse judgment.
of Alto adults live with a disability (California 30.4%). Thinking or memory is the most common.
Every CDC estimate for Alto
Share of adults, 40 measures, with CDC’s likely range.
On the 32 measures below that have a better and a worse direction, Alto is better than California on 19 and worse on 1; on the rest, the California figure falls inside Alto’s likely range, so we call them about the same. Disability and SNAP are described, not compared as better or worse.
| Adults who… | Alto | CA | U.S. | vs CA |
|---|---|---|---|---|
| Overall health | ||||
| Fair or poor health | 13.8%11.4–16.6 | 22.1% | 19.4% | Better |
| Frequent physical distress (physical health not good 14+ days a month) | 11%9.3–12.8 | 13.4% | 13% | Better |
| Frequent mental distress (mental health not good 14+ days a month) | 15%12.8–17.1 | 16.4% | 15.9% | About the same |
| Conditions | ||||
| Obesity | 21.8%16.5–27.7 | 27.8% | 32.9% | Better |
| Diabetes | 8.3%7–9.7 | 11.7% | 12% | Better |
| High blood pressure | 28.4%24.5–32.2 | 30.5% | 34.4% | About the same |
| High cholesterol (adults screened in 5 years) | 34.4%30.3–38.7 | 35.4% | 37.1% | About the same |
| Arthritis | 22.6%19.6–25.8 | 20.8% | 25.3% | About the same |
| Asthma | 10%8.8–11.3 | 9.3% | 9.9% | About the same |
| Cancer, other than skin cancer | 8.8%8–9.8 | 6.4% | 7.9% | Worse |
| Coronary heart disease | 4.7%4.1–5.5 | 5.6% | 6.4% | Better |
| COPD | 4.3%3.5–5.4 | 5.1% | 6.3% | About the same |
| Stroke | 2.5%2.1–2.8 | 3.1% | 3.4% | Better |
| Lost all teeth (ages 65+) | 4%3.1–5 | 10.6% | 12.3% | Better |
| Habits | ||||
| Smoke cigarettes | 8.4%6.1–10.8 | 10.9% | 11.8% | Better |
| No exercise outside work | 14.9%11.7–18.6 | 24.6% | 24.7% | Better |
| Binge drinking | 18%14.9–21.3 | 15.3% | 15.4% | About the same |
| Sleep under 7 hours | 31.6%25.8–37.3 | 35.1% | 36% | About the same |
| Checkups and coverage | ||||
| No health insurance (ages 18–64) | 3.6%2.8–4.7 | 10.6% | 11% | Better |
| Checkup in the past year | 72.7%68.6–76.4 | 71.9% | 77.4% | About the same |
| Dentist visit in the past year | 73.2%70–76.2 | 62.8% | 63.2% | Better |
| Cholesterol check in 5 years | 90.1%88.7–91.5 | 85.4% | 87.1% | Better |
| Taking blood pressure medicine (adults with high blood pressure) | 71.7%67.8–75.4 | 71.3% | 76.5% | About the same |
| Colorectal cancer screening (ages 45–75) | 64.8%59.6–69.5 | 57.5% | 65.5% | Better |
| Mammogram in 2 years (women 50–74) | 79.2%72–85 | 75.7% | 76.4% | About the same |
| Mind and connection | ||||
| Ever told they have depression | 22.9%19.4–26.5 | 20.1% | 20.6% | About the same |
| Feel lonely | 28.6%24.4–33.5 | 37.3% | 32.5% | Better |
| Lack social and emotional support | 20.3%17–23.8 | 28.6% | 23.6% | Better |
| Everyday needs | ||||
| Worried about having enough food | 7.2%5.4–9.3 | 17.9% | 15% | Better |
| Worried about keeping housing | 7.3%5.7–9.1 | 14.9% | 12% | Better |
| Threatened with a utility shut-off | 4.3%3.5–5.3 | 7.3% | 7.6% | Better |
| Lack reliable transportation | 4.9%4.1–5.9 | 9.3% | 7.9% | Better |
| Received SNAP (food stamps) | 6.7%4.9–8.9 | 15.6% | 11.6% | Lower |
| Disability | ||||
| Any disability | 23.3%19.3–27.4 | 30.4% | 30.1% | Lower |
| Difficulty walking or climbing stairs | 9.7%7.9–11.8 | 13.8% | 13.6% | Lower |
| Difficulty concentrating or remembering | 10.6%8.9–12.5 | 14.6% | 13.9% | Lower |
| Hearing difficulty | 4.9%4.2–5.6 | 5.9% | 6.7% | Lower |
| Vision difficulty | 3%2.6–3.6 | 5.6% | 5.4% | Lower |
| Difficulty doing errands alone | 5.5%4.6–6.6 | 8.1% | 7.9% | Lower |
| Difficulty dressing or bathing | 2.5%2.1–3 | 3.9% | 3.8% | Lower |
Each figure is the share of adults 18+ unless the label says otherwise; small numbers after it are CDC’s likely range (95% interval). “About the same” means the California figure falls inside that range.
Questions about health in Alto
Is Alto a healthy place to live?
On seven CDC estimates for adults, Alto is healthier than 96% of U.S. towns: A+ for health. Among U.S. towns with similar household incomes it’s healthier than 92%. These are modeled estimates of who lives there, not a measure of local care or habits alone.
What is the obesity rate in Alto?
CDC estimates 21.8% of adults have obesity, likely between 16.5% and 27.7%, against 27.8% across California and 32.9% nationally.
What hospital is closest to Alto?
Marinhealth Medical Center in Greenbrae, 3.1 miles in a straight line from Alto’s center point, is the nearest general hospital with an emergency room; Medicare rates it 5 of 5 stars.
How many people in Alto have no health insurance?
CDC estimates 3.6% of adults ages 18–64 have no health insurance (likely 2.8–4.7%), against 10.6% across California.
How accurate are these numbers?
They’re modeled estimates: CDC applies national survey answers to each area’s age, sex, race and education mix, so they describe who lives in Alto more than anything measured there. At the ends of CDC’s ranges the grade could be anywhere from A− to A+.
Neighbors talk health
Doctors taking patients, urgent care, staying active in Alto.
Health estimates: CDC PLACES: Local Data for Better Health, 2025 release. The California figure combines its counties, weighted by adult population. Hospitals and star ratings: Medicare Care Compare (CMS). Health centers and shortage areas: HRSA. The Health Grade is our own summary of CDC’s estimates, not an official rating. Ages: U.S. Census Bureau, American Community Survey. Town boundaries: U.S. Census Bureau. This page isn’t medical advice. In an emergency, call 911.