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County · code 27091

Martin CountyMinnesota

Martin County is a county in Minnesota, with its seat in Fairmont, formed in 1857.

  • Founded1857
  • County seatFairmont
  • Named forMorgan Lewis Martin
  • Land area712 sq mi + 17 sq mi water
  • Population20,025 2020 Census
  • Parcels mapped15,574 checked 16 October 2026
Open the free map Click any parcel in Martin County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

WatonwanEmmet, IAFaribault Fairmont Census outline · seat marked

Where it is

Martin on the map of Minnesota

Minnesota has 87 counties and county equivalents, each with its own records office. Shapes with a page are links.

Aitkin CountyAnoka CountyBecker CountyBeltrami CountyBenton CountyBig Stone CountyBlue Earth CountyBrown CountyCarlton CountyCarver CountyCass CountyChippewa CountyChisago CountyClay CountyClearwater CountyCook CountyCottonwood CountyCrow Wing CountyDakota CountyDodge CountyDouglas CountyFaribault CountyFillmore CountyFreeborn CountyGoodhue CountyGrant CountyHennepin CountyHouston CountyHubbard CountyIsanti CountyItasca CountyJackson CountyKanabec CountyKandiyohi CountyKittson CountyKoochiching CountyLac qui Parle CountyLake CountyLake of the Woods CountyLe Sueur CountyLincoln CountyLyon CountyMcLeod CountyMahnomen CountyMarshall CountyMeeker CountyMille Lacs CountyMorrison CountyMower CountyMurray CountyNicollet CountyNobles CountyNorman CountyOlmsted CountyOtter Tail CountyPennington CountyPine CountyPipestone CountyPolk CountyPope CountyRamsey CountyRed Lake CountyRedwood CountyRenville CountyRice CountyRock CountyRoseau CountySt. Louis CountyScott CountySherburne CountySibley CountyStearns CountySteele CountyStevens CountySwift CountyTodd CountyTraverse CountyWabasha CountyWadena CountyWaseca CountyWashington CountyWatonwan CountyWilkin CountyWinona CountyWright CountyYellow Medicine CountyMartin County Martin
Counties of Minnesota · Martin highlighted

History

Formed in 1857 from Brown County and Faribault County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Martin County was created on May 23, 1857, from parts of Brown and Faribault counties. The county was named after Morgan Lewis Martin. In the following years, Martin's boundaries changed as Jackson, Nobles, and Rock counties were attached and then detached for judicial purposes.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1857
    Martin County created Martin created from Brown and Faribault, fully organized.
    from Brownfrom Faribault
    · Minn. Terr. Laws 1857, ext. sess., ch. 14, secs. 1, 6/pp. 66-69
  2. 1865
    Changed Martin's boundaries confirmed (no change); Jackson attached to Martin "for judicial purposes."
    Jackson
    · Minn. Laws 1865, spec., ch. 72, secs. 1-4/pp. 141-142; ch. 84, sec. 1/p. 243
  3. 1866
    Changed Nobles and Rock detached from Brown, attached to Martin "for judicial purposes."
    NoblesRockBrown
    · Minn. Gen. Stat. 1866, ch. 64, title 4, sec. 33/p. 419
  4. 1870
    Changed Jackson fully organized, detached from Martin; Nobles and Rock detached from Martin, attached to Jackson "for judicial purposes."
    JacksonNoblesRock
    · Minn. Laws 1870, gen., ch. 86, secs. 1-3/ p. 155

Land and parcels

What the maps cover in Martin

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Martin by the Census

Population
20,025 2020 Census count
Housing units
9,748 2020 Census count
Land area
712 square miles
Water area
17 square miles
People per sq mi
28 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Records

Permits

Zoning and code

County government

See your own lot on these maps

Open Martin County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about Martin County

When was Martin County founded?
Martin County was founded in 1857, formed from Brown County and Faribault County, and named after Morgan Lewis Martin.
What is the county seat of Martin County?
The county seat of Martin County is Fairmont.
Is there an online parcel map for Martin County?
Yes. Martin County publishes a parcel map of 15,574 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Martin County's boundary or name changed?
Martin County was created in 1857 from Brown County and Faribault County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Nobles County, Rock County and Brown County.
Is my lot in a flood zone?
We do not have flood maps for Martin County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door