Michigan County Records: How All 83 Counties Fit Together for Genealogy

Michigan has 83 counties and roughly 1,240 townships under them. Almost every genealogical record you’ll ever chase (a birth, a marriage, a will, a deed) was first written down at the county level, not the state level. The state only started centralizing anything in 1867, when Public Act 194 required townships to report births and deaths up through the county clerk. Everything before that, and most of what came after, still lives (or once lived) in a specific county courthouse.

That sounds simple until you hit a county that didn’t exist yet, or existed but wasn’t running its own government. I chased a Midland County ancestor’s 1840s land record straight into Saginaw County’s files before I understood why — Midland wasn’t organized until 1850, so anything earlier was filed wherever it was attached. This page is the map I wish I’d had starting out: how Michigan’s counties were built, how to find the right one for a given year, and links to the counties this site covers in depth. It’s genealogy groundwork, not genealogy itself, but skipping it is how researchers burn a weekend searching a database that never held the record in the first place.

Why does the exact county matter so much in Michigan research?

Because county government is where the genealogy paper trail starts. County clerks are the office of record for births, deaths, and marriages reported after 1867 (marriages earlier in some counties), the register of deeds holds land transactions, and the probate court holds wills, guardianships, and any court records that resulted from a case heard there. Vital records don’t originate in Lansing — the state doesn’t create them, it only receives copies, indexes, or nothing at all until you request a certificate from the county directly. Search the wrong county and no state-level directory or database will save you, because the record was never filed there.

How Michigan’s 83 counties came to be

Not all at once, and not cleanly. Michigan’s territorial government “set off” blocks of counties years or decades before settlers arrived, to get ahead of settlement: twelve at a time in 1829 and 1831, twenty-nine more in a single 1840 law. A newly set-off county had a name and a boundary on a map but no courthouse, no officials, often no residents. Until it grew enough to petition for formal organization, it stayed “attached” to an already-organized county for judicial purposes, and its residents traveled there for court, land, and tax business.

Michigan’s 83rd and last county organized in 1891, and boundaries have been stable since 1897 — good news for 20th-century research. It’s the 19th century that gets complicated, because attachments shifted, sometimes more than once, before a county finally stood on its own:

• Isabella, Midland, Tuscola, Gladwin, and Clare were all attached to Saginaw County at various points before each organized separately between 1850 and 1875.
• Missaukee County moved through Mackinac, Antrim, Grand Traverse, and Manistee before finally organizing in 1871 — four “parent” counties in roughly three decades.
• Oscoda County passed through Michilimackinac (Mackinac), Cheboygan, Iosco, and Alpena attachments before organizing in 1881.
• Marquette and Houghton were both carved from territory attached to Chippewa County in the 1840s.

None of this means your ancestor moved. It means the county did. Between 1935 and 1942, the Works Progress Administration’s Historical Records Survey sent field workers into Michigan’s courthouses to inventory exactly this kind of document, though only a handful of the planned county guides were ever finished.

How do I find the “parent” county for an early Michigan record?

1. Pin down the approximate year of the record you’re chasing — census records, a land patent, an obituary, anything with a date attached.
2. Check whether the county was organized yet in that year. Several of the counties above weren’t fully functioning governments until decades after they first appeared on a map.
3. If it wasn’t organized, find what it was attached to “for judicial purposes” in that specific year — attachments changed over time, so the right parent county depends on the exact date, not just the general era.
4. Search that parent county’s clerk, probate, and land records for the years in question, not the modern county your ancestor’s town now belongs to.
5. Cross-check the chronology against the Newberry Library’s Atlas of Historical County Boundaries, which documents every Michigan county’s boundary changes and attachments year by year — it’s the most complete free reference for this exact problem.

What does a county clerk hold, versus the state?

Birth records, death records, marriage records, and divorce records all start the same way: filed at the county. Each one still ends up governed by a different retention and access rule. Two offices, two jobs, two different directories to search. The county clerk is where you go for a certified copy, the physical certificate, or anything too recent for the state to have indexed. The Archives of Michigan and Michiganology are where older, transferred material ends up free and searchable in a genealogy-friendly database, once you already know the county. When a county clerk’s own office comes up empty, the Michigan Department of Health and Human Services and the Library of Michigan are the two state-level fallbacks worth trying next.

Michigan counties covered on this site

Coverage is built one county at a time, because getting a county’s record set right means verifying it against a real source rather than publishing a placeholder page. Here’s what’s live now:

What if your county isn’t on this list yet?

That doesn’t mean nothing survives — it means this site hasn’t verified and rebuilt that county’s page yet. In the meantime:

• Archives of Michigan in Lansing holds transferred records for all 83 counties, and the Library of Congress’s Michigan research guide is a solid free index of what else exists nationally.
• Michiganology, the Archives’ free digital portal, is worth checking before assuming a record isn’t online.
• FamilySearch’s wiki has a page for every Michigan county, with links to that county’s specific digital collections, local history material, and courthouse contacts.
• The county clerk’s office is still the fastest path for anything recent, and most will do a phone or mail lookup with a name and approximate date — larger offices like Kent County, Michigan, run a fully online request system, but most of the 12 counties covered here still need a call or a letter.
• The Michigan Genealogical Council maintains a directory of local genealogical and family history societies by county — often the fastest way to find cemetery transcriptions, church books, and microfilm that never made it into any statewide index.

Frequently asked questions

Is MI Family History affiliated with any volunteer county genealogy project? No. This is an independent research site. For county government records, go to the county clerk directly.

How many counties does Michigan have, and has that number changed? Michigan has had 83 counties since 1891. Boundaries have been essentially fixed since 1897.

My ancestor’s town isn’t in the county I expected. What happened? Michigan counties were often set off on paper years before they had a working government. Residents used a neighboring organized county in the meantime, and that’s usually where the record was filed.

What’s the difference between a county clerk’s office and the Archives of Michigan? The county clerk holds current records and issues certified copies. The Archives is the State of Michigan’s permanent repository for older, transferred material, searchable free through Michiganology — a genealogist’s second stop after the county comes up empty.

Which Michigan counties does this site cover right now? Twelve — see the table above. More are being verified and added on an ongoing basis.