Petersburg is a city in Monroe County, Michigan, home to about 1,179 people across 0.5 square miles. It has no ZIP code of its own: it’s part of 49270.
Homes sold for a median of $171 per square foot in the three months ending August 2026, a seller’s market.
Mostly Summerfield; part is in Petersburg
Each card is that ZIP code’s whole market, including any part outside Petersburg. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Petersburg’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Petersburg well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Detroit Metropolitan Wayne County Airport (DTW)29 miles away |
|---|---|
| Closer regional airport | Eugene F. Kranz Toledo Express Airport (TOL)21 miles away |
| Nearest city of 250,000+ | Toledo, OH16 miles away |
| Nearest city of 1 million+ | Chicago, IL206 miles away |
Straight-line distances from the center of Petersburg; 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.
Petersburg had 1,171 residents in the 2020 census, up 1% since 2000.
It’s the 1107th largest of 1,531 towns in Michigan by population.
Monroe County grew from 32,754 residents in 1900 to 154,809 in 2020.
Monroe County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 17°F. About 35 inches of rain and melted snow fall in a typical year, with about 39 inches of snow.
Source: NOAA 1991–2020 climate normals, Dundee, MI weather station (6 miles away).
37,143 jobs at 2,395 businesses in Monroe County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Petersburg.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 1 |
|---|---|
| Mental health providers | 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 (1 nearby)
Libraries
Counts are within about 1 mile 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 Summerfield Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Summerfield Elementary SchoolPetersburg | Pre-K–6 | 312 | Public | 2.0 mi |
| Summerfield JuniorSenior High SchoolPetersburg | 7–12 | 251 | Public | 2.2 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.
Buying or selling around Petersburg? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with Summerfield, Ida, Dundee, Bedford Township and Whiteford.
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.