If Michigan's Lower Peninsula is shaped like a mitten, this small city on the Pine River sits right in its center. The state agreed back in the 1950s, and a sign in Clapp Park along M-46 still calls St. Louis the "Middle of the Mitten." A century before that, the town was a fashionable health resort, drawing visitors to mineral springs whose water was thought to cure all sorts of ailments. The spa hotel and bathhouses are long gone, but handsome old downtown buildings from that era remain.
At a glance
State millage data currently shows about 40.6 mills for a primary home. One school district appears in the rate data, but parcel tax districts and PRE status still decide the final bill.
Practical directory
Common home and paperwork paths
Start with the Michigan guide that matches the job. For a parcel, bill, permit, or recorded document in St Louis, confirm the final answer with the local or county office shown farther down this page.
- Delinquent property tax Get help before the redemption date Find the foreclosing unit, exact payoff, assistance programs, counseling, and legal-help paths.
- Utility shutoff or past-due bill Work the utility-help sequence Call the provider, apply for emergency relief, use 2-1-1, and ask about household protections.
- Essential home repair Find repair or weatherization help Match the repair, household, service area, and rural status to programs that may actually fit.
- Home and estate Handle a home after someone dies Keep the property stable, find the deed and authority to act, and choose the right estate or title path.
- Manufactured home Transfer or repair the home title Start with the Secretary of State path for a sale, missing title, lien, or legal affixture to land.
- Permits and repairs Check a permit or contractor Find who enforces the work in St Louis, what to put in writing, and where to check a license.
Who handles what
Send the question to the right office
Start local for a parcel, tax bill, permit, or housing rule. Move to the county or a district when the record or service covers more than one community.
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Assessment, PRE, current tax bill, or Board of Review
St Louis assessor or treasurer
Start with the St Louis office shown on the assessment notice or tax bill. The assessor handles value and exemptions; the treasurer handles the current summer or winter bill.
Michigan property-tax basics -
Rental registration, building permit, or code problem
St Louis building, rental, or code office
The enforcing agency can be the municipality, county, or state, and electrical, mechanical, and plumbing work may go to different places.
Find the official permit jurisdiction ↗ Michigan homeowner guide -
Marriage license, local record, deed, or delinquent tax
Gratiot County offices
The clerk, register of deeds, and county treasurer handle different parts of this work. The county page separates them for you.
Open the official Gratiot County site ↗ Getting married in Michigan -
Private well, septic system, local health, or trial court
County, district, or court finder
A health district or court can serve more than one community. The county page links to the official statewide finders.
Find the local health department ↗ Michigan well and septic guide
The practical stuff
Buying, owning, or selling in St Louis
The seller's tax bill may not be your tax bill.
2025 property-tax snapshot
- Primary home (PRE)
- 40.6324 mills - 40.6324 mills
- Other property / non-homestead
- 58.6324 mills - 58.6324 mills
- School districts available
- 1 in St Louis
One mill means $1 per $1,000 of Taxable Value. Rate rows come from the official 2025 Michigan Treasury report. Last reviewed July 12, 2026.
What these local words mean
- Primary home (PRE)
- A home you own and live in as your main home. PRE stands for Principal Residence Exemption and can lower the school operating tax.
- Non-homestead
- Property that is not treated as the owner's main home, such as a rental, vacation home, or second home.
- Assessor
- The local office that estimates and records property values and exemptions.
- Treasurer
- The local office that collects property tax payments and can confirm bill timing.
Michigan homebuyer tax calculator
See the tax bill after you buy.
Where is the house?
Pick the county, city or township, and school district. We use the official 2025 tax rates published by Michigan Treasury.
Not sure of the school district? Check the property listing. It is usually under "Schools."
Need to double-check the exact parcel? Use the official state estimator at treas-secure.state.mi.us/ptestimator or call the local treasurer. Rates can change across city, township, village, and school district lines, so the exact parcel matters.
Why a buyer's property-tax bill can change after a sale
In Michigan, property tax isn't figured on what you paid — it's figured on the home's Taxable Value, with the local millage rates applied to that number. While one owner keeps the home, Proposal A caps how fast that Taxable Value can climb. When the home sells, the cap usually comes off — this is called uncapping — and the Taxable Value resets toward the State Equalized Value, or SEV, which tends to run about half of a home's market value.
That reset is the part that catches buyers: a longtime owner may have been paying on an old, capped number, so the year after you buy, yours can jump to the new one — and your first full-year bill can land well above what the seller was paying. In St Louis, one school district appears in the rate data. Parcel-specific tax districts can still matter. For a primary home with PRE, Michigan's main-home exemption, the rate shown here is about 40.6 mills. Without PRE, the non-homestead rate is about 58.6 mills. The calculator above turns those local rates into your actual number.
If this will be your main home, make sure that PRE is filed with the local assessor — it can lift up to 18 school-operating mills off the bill. Rentals, vacation homes, and second homes stay on the higher non-homestead rate.
The tax reset is the big one, but it isn't the whole checklist. It's also worth checking whether the address sits in a floodplain, and whether you'll owe a city income tax where you live or work. The buying-a-home guide walks through the rest.
School districts in this area
St Louis Public School
Primary home (PRE) 40.6324 mills · non-homestead 58.6324 mills
Local rules and costs to check
Note-sized practical catches tied to St Louis: taxes, property rules, permits, local costs, or other things worth checking before you decide.
Local check
The old chemical plant and the Pine River
St. Louis has a long-running Superfund cleanup tied to the old Michigan Chemical/Velsicol plant, PBB, DDT, and the Pine River.
Local check
No city income tax here
Alma, Ithaca, and St. Louis charge no city income tax; the nearest cities that do are Saginaw and Lansing, which tax commuters' wages at nonresident rates.
Local check
In Michigan, you get two property-tax bills a year — not one
Most Michigan property owners get separate summer and winter tax bills, with local rules deciding what lands on each bill.
Stories & local context
Get to know St Louis
St. Louis also carries a heavier piece of history. From 1936 to 1978, a chemical plant on the Pine River made DDT and the flame retardant PBB, and the site is now one of the country's longest-running federal Superfund cleanups. Homes in town are on tested municipal water, and thousands of people live here without trouble. But if you're buying near the old plant site or the river, it's worth understanding the boundaries and asking normal due-diligence questions. The city does not charge a local income tax, and the notes below cover both the cleanup and the springs.
As with most Michigan property, expect separate summer and winter tax bills rather than a single yearly one.
Featured local story
Why a town in mid-Michigan is named St. Louis
St. Louis, Michigan, grew from Joseph Clapp's 1853 sawmill on the Pine River and took its name from St. Louis, Missouri — the city where the county's own namesake, General Charles Gratiot, spent his final years.
Read the story →-
The Middle of the Mitten
St. Louis marks the geographic center of Michigan's Lower Peninsula and has a mineral-springs resort history.
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When St. Louis was 'the Saratoga of the West'
In 1869 a salt-drilling crew in St. Louis struck 'magnetic' mineral water, and for a generation the town was a famous health resort with grand hotels and celebrity guests.
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Gratiot County's other crop: wind
Gratiot County's 133-turbine wind project was Michigan's largest when it opened in 2012, and the county now hosts six wind farms that support farms and local services.
Nearby places
The closest Michigan Porch pages to St Louis. Open one to read it, or put it side by side with St Louis — tax rates, school districts, and city income tax.
Compare St Louis with a neighbor →Next steps
What to check next for St Louis
Use the county office map for records and services, or follow the home path that matches what you are doing now.
- County Open Gratiot County See the county page for other cities, townships, villages, local notes, and the county-wide tax snapshot. Open county page →
- Homeowner Keep the house on track Use one calm directory for tax notices, insurance, contractors, permits, records, and repairs. Open homeowner guide →
- Seller Plan the Michigan closing Walk through disclosure, title, transfer tax, PRE rescission, and the records worth keeping. Open seller guide →
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