Photo: IvoShandor · CC BY-SA 3.0On CDC estimates, Seneca is healthier than 51% of U.S. towns
Seneca differs from Illinois on 6 of 32 measures CDC estimates: 1 better, 5 worse.
Modeled estimates for adults 18+, CDC’s own estimate for Seneca. How CDC estimates town health
What stands out about health in Seneca
Depression is more common in Seneca
1 in 4 adults have been diagnosed with depression (24%), vs 19.8% across Illinois. Frequent mental distress is above the state too: 18.4%, vs 15.6% across Illinois. Mind & connection ↓
Smoking is more common in Seneca
1 in 6 adults smoke cigarettes (15.8%), vs 12.1% across Illinois. Habits ↓
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 Illinois figure falls outside Seneca’s likely range; at the ends of CDC’s ranges the grade could be anywhere from C− to A−.
What’s behind Seneca’s grade
On seven CDC estimates for adults, Seneca is healthier than 51% of U.S. towns. Diabetes holds the grade up (fewer adults with diabetes than 68% of U.S. towns); mental distress pulls it down (better than 27%).
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). Seneca’s median household income is $86,830; among the 10,263 U.S. towns within 25% of that ($65K–$109K), it’s healthier than 42%, so it sits below most towns with similar incomes, too.
How Seneca adults are doing
On 2 of 4 measures, Seneca runs above Illinois.
1 in 3 Seneca 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.
Everyday habits, side by side with Illinois
Share of adults, with the Illinois figure marked.
Walk with neighbors
The easiest exercise habit to keep is one with company.
Out of every 100 Seneca adults…
Seneca runs above IL on 2 of 12 conditions. Tap one to see it as people.
Only 12% of Seneca residents are 65 or older, vs 17% across Illinois. Age-related conditions run low partly because the town is young.
Care in and near Seneca
No hospital or community health center in Seneca 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 Seneca; ≈ marks a hospital located by its town, not its street. Shortage areas: HRSA Health Professional Shortage Areas (a “population” designation covers specific residents, such as those with low incomes).
Keeping up with care
Share of Seneca adults getting routine care. The full ring is 100%; the dark tick marks Illinois.
Making ends meet
Needs that shape health as much as any doctor visit: food, housing, utilities and a way to get around.
13.5% of Seneca adults receive SNAP (food stamps), compared with 13.8% across Illinois.
Seneca and the towns around it
Seneca’s Health Grade ranks 2nd 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 |
|---|---|---|---|---|---|
| Seneca | B− | 37.7% | 10.9% | 15.8% | CDC place |
| Brookfield Township | B− | 37.5% | 11.6% | 15.3% | ZIP codes |
| Manlius Township | B− | 37.8% | 11.8% | 15.6% | ZIP codes |
Same-state neighbors only, ordered by length of shared border.
Living with a disability
Shown without a better/worse judgment.
of Seneca adults live with a disability (Illinois 27.6%). Thinking or memory is the most common.
Every CDC estimate for Seneca
Share of adults, 40 measures, with CDC’s likely range.
On the 32 measures below that have a better and a worse direction, Seneca is better than Illinois on 1 and worse on 5; on the rest, the Illinois figure falls inside Seneca’s likely range, so we call them about the same. Disability and SNAP are described, not compared as better or worse.
| Adults who… | Seneca | IL | U.S. | vs IL |
|---|---|---|---|---|
| Overall health | ||||
| Fair or poor health | 18.6%15.9–21.7 | 18.6% | 19.4% | About the same |
| Frequent physical distress (physical health not good 14+ days a month) | 13.7%11.9–15.7 | 12.2% | 13% | About the same |
| Frequent mental distress (mental health not good 14+ days a month) | 18.4%16.1–20.8 | 15.6% | 15.9% | Worse |
| Conditions | ||||
| Obesity | 37.7%29.8–46.2 | 34% | 32.9% | About the same |
| Diabetes | 10.9%9.4–12.7 | 11.7% | 12% | About the same |
| High blood pressure | 33.5%29.4–37.9 | 33% | 34.4% | About the same |
| High cholesterol (adults screened in 5 years) | 35.4%31–39.9 | 35.4% | 37.1% | About the same |
| Arthritis | 26.7%23.4–30.2 | 24.2% | 25.3% | About the same |
| Asthma | 10.7%9.3–12.1 | 9.9% | 9.9% | About the same |
| Cancer, other than skin cancer | 8.2%7.3–9 | 7.6% | 7.9% | About the same |
| Coronary heart disease | 6.2%5.5–7 | 5.9% | 6.4% | About the same |
| COPD | 7.6%6.6–8.8 | 6.3% | 6.3% | Worse |
| Stroke | 3.3%3–3.6 | 3.3% | 3.4% | About the same |
| Lost all teeth (ages 65+) | 10.9%8.6–13.4 | 10.3% | 12.3% | About the same |
| Habits | ||||
| Smoke cigarettes | 15.8%13.2–18.6 | 12.1% | 11.8% | Worse |
| No exercise outside work | 23.4%18.9–28.1 | 23% | 24.7% | About the same |
| Binge drinking | 20.1%16.5–24 | 17.8% | 15.4% | About the same |
| Sleep under 7 hours | 35.8%29–43.2 | 35.4% | 36% | About the same |
| Checkups and coverage | ||||
| No health insurance (ages 18–64) | 7.7%6.3–9.4 | 9.9% | 11% | Better |
| Checkup in the past year | 76.8%72.7–80.5 | 77.8% | 77.4% | About the same |
| Dentist visit in the past year | 62.7%58.8–66.6 | 63.4% | 63.2% | About the same |
| Cholesterol check in 5 years | 85%82.8–87.1 | 87.4% | 87.1% | Worse |
| Taking blood pressure medicine (adults with high blood pressure) | 75%71.6–78 | 75.7% | 76.5% | About the same |
| Colorectal cancer screening (ages 45–75) | 61.1%55.3–66.8 | 60.2% | 65.5% | About the same |
| Mammogram in 2 years (women 50–74) | 72.2%63.4–79.9 | 73.5% | 76.4% | About the same |
| Mind and connection | ||||
| Ever told they have depression | 24%20.3–28 | 19.8% | 20.6% | Worse |
| Feel lonely | 34.4%29.1–40.1 | 33.5% | 32.5% | About the same |
| Lack social and emotional support | 24.7%20.9–28.6 | 25.4% | 23.6% | About the same |
| Everyday needs | ||||
| Worried about having enough food | 14%11.6–16.7 | 15.9% | 15% | About the same |
| Worried about keeping housing | 11.4%9.5–13.4 | 13.2% | 12% | About the same |
| Threatened with a utility shut-off | 7.3%6.2–8.5 | 7.8% | 7.6% | About the same |
| Lack reliable transportation | 7.5%6.4–8.6 | 8% | 7.9% | About the same |
| Received SNAP (food stamps) | 13.5%11–16 | 13.8% | 11.6% | About the same |
| Disability | ||||
| Any disability | 29.7%25.3–34.5 | 27.6% | 30.1% | About the same |
| Difficulty walking or climbing stairs | 13.2%11.3–15.4 | 12.8% | 13.6% | About the same |
| Difficulty concentrating or remembering | 14.5%12.6–16.6 | 12.6% | 13.9% | About the same |
| Hearing difficulty | 6.8%5.9–7.7 | 6.2% | 6.7% | About the same |
| Vision difficulty | 4.6%4.1–5.2 | 4.8% | 5.4% | About the same |
| Difficulty doing errands alone | 8.4%7.4–9.7 | 7.6% | 7.9% | About the same |
| Difficulty dressing or bathing | 3.6%3.2–4.1 | 3.5% | 3.8% | About the same |
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 Illinois figure falls inside that range.
Questions about health in Seneca
Is Seneca a healthy place to live?
On seven CDC estimates for adults, Seneca is healthier than 51% of U.S. towns: ≈ B− for health. Among U.S. towns with similar household incomes it’s healthier than 42%. These are modeled estimates of who lives there, not a measure of local care or habits alone.
What is the obesity rate in Seneca?
CDC estimates 37.7% of adults have obesity, likely between 29.8% and 46.2%, against 34% across Illinois and 32.9% nationally.
What hospital is closest to Seneca?
Morris Hospital & Healthcare Centers in Morris, 10.7 miles in a straight line from Seneca’s center point, is the nearest general hospital with an emergency room; Medicare rates it 4 of 5 stars.
How many people in Seneca have no health insurance?
CDC estimates 7.7% of adults ages 18–64 have no health insurance (likely 6.3–9.4%), against 9.9% across Illinois.
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 Seneca more than anything measured there. At the ends of CDC’s ranges the grade could be anywhere from C− to A−.
Neighbors talk health
Doctors taking patients, urgent care, staying active in Seneca.
Health estimates: CDC PLACES: Local Data for Better Health, 2025 release. The Illinois 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.