Seneca is a township in Lenawee County, Michigan, home to about 1,038 people across 40 square miles. It has no ZIP code of its own: it’s part of 49235, 49256 and 49279.
Homes sold for a median of $105 per square foot across 3 ZIP codes in the three months ending August 2026, and 0 of 3 were seller’s markets.
Mostly Dover Township (Lenawee County); part is in Seneca
Mostly Morenci; part is in Seneca
Mostly Fairfield Township (Lenawee County); part is in Seneca
Each card is that ZIP code’s whole market, including any part outside Seneca. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Seneca’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Detroit Metropolitan Wayne County Airport (DTW)53 miles away |
|---|---|
| Closer regional airport | Eugene F. Kranz Toledo Express Airport (TOL)24 miles away |
| Nearest city of 250,000+ | Toledo, OH33 miles away |
| Nearest city of 1 million+ | Chicago, IL180 miles away |
Straight-line distances from the center of Seneca; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Seneca had 1,155 residents in the 2020 census, down 11% since 2000.
It’s the 1170th largest of 1,531 towns in Michigan by population.
Lenawee County grew from 48,406 residents in 1900 to 99,423 in 2020.
Lenawee County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 15°F. About 38.1 inches of rain and melted snow fall in a typical year, with about 32 inches of snow.
Source: NOAA 1991–2020 climate normals, Morenci, MI weather station (3 miles away).
23,238 jobs at 1,808 businesses in Lenawee County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
8 doctors and other health care providers list an office in Seneca’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Dentists | 1 |
| Mental health providers | 2 |
| Chiropractors | 3 |
| Pharmacies | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (4 nearby)
Grocery stores (1 nearby)
Pharmacies (1 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Counts are within about 4 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Morenci Area Schools, Sand Creek Community Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Morenci Elementary SchoolMorenci | Pre-K–5 | 227 | Public | 2.9 mi |
| Ruth McGregor Elementary SchoolSand Creek | Pre-K–5 | 352 | Public | 6.3 mi |
| Morenci Middle and High SchoolMorenci | 6–12 | 269 | Public | 2.7 mi |
| Sand Creek High SchoolSand Creek | 6–12 | 404 | Public | 6.4 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Morenci, Dover Township (Lenawee County), Fairfield Township (Lenawee County), Medina, Madison, Rollin, Hudson Township (Lenawee County) and Rome.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.