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County · code 27083

Lyon CountyMinnesota

Lyon County is a county in Minnesota with its seat in Marshall. It was formed on November 2, 1869, from Redwood County and was named after Nathaniel Lyon.

  • Founded1869
  • County seatMarshall
  • Named forNathaniel Lyon
  • Land area714 sq mi + 7.3 sq mi water
  • Population25,269 2020 Census
  • Parcels mapped16,401 checked 16 October 2026
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Updated

Yellow MedicineMurrayLincolnRedwood Marshall Census outline · seat marked

Where it is

Lyon 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 CountyMcLeod CountyMahnomen CountyMarshall CountyMartin 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 CountyLyon County Lyon
Counties of Minnesota · Lyon highlighted

History

Formed in 1869 from Redwood County

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

Lyon County was created from Redwood County but was not immediately fully organized, remaining attached to Redwood for judicial purposes. The county was organized for government on August 12, 1870, and became fully detached from Redwood on March 9, 1875. Lyon lost territory to the creation of Lincoln County in 1873 but later served as an intermediate attachment for Lincoln until Lincoln was fully organized and detached in 1881.

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

  1. 1869
    Lyon County created Lyon created from Redwood; Lyon not fully organized, attached to Redwood "for judicial purposes."
    from Redwood
    · Minn. Laws 1869, gen., ch. 94, secs. 1-4/pp. 115-116
  2. 1870
    Changed Lyon organized for county government. · Anderson, 10-11; Minn. Laws 1873, gen., ch. 83, sec. 1/p. 202; Rose, 49
  3. 1873
    Lost territory Lyon lost to the creation of Lincoln; Lyon remained attached to Redwood.
    to Lincolnto Redwood
    · Minn. Laws 1873, gen., ch. 92, secs. 1-2, 11/pp. 208-211
  4. 1875
    Changed Lincoln detached from Redwood, attached to Lyon "for judicial purposes." (Lincoln remained indirectly attached to Redwood, through Lyon, until 9 March 1875.)
    LincolnRedwood
    · Minn. Laws 1875, gen., ch. 71, sec. 1/pp. 97-98
  5. 1875
    Changed Lyon fully organized, detached from Redwood.
    Redwood
    · Minn. Laws 1875, gen., ch. 70, sec. 1/p. 97; Rose, 84
  6. 1881
    Changed Lincoln fully organized, detached from Lyon.
    Lincoln
    · Minn. Laws, 1881, reg. sess., gen., ch. 85, sec. 1/pp. 95-96

Land and parcels

What the maps cover in Lyon

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

Lyon by the Census

Population
25,269 2020 Census count
Housing units
11,180 2020 Census count
Land area
714 square miles
Water area
7.3 square miles
People per sq mi
35 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

Lyon County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

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Questions

Common questions about Lyon County

When was Lyon County founded?
Lyon County was founded in 1869, formed from Redwood County, and named after Nathaniel Lyon.
What is the county seat of Lyon County?
The county seat of Lyon County is Marshall.
Is there an online parcel map for Lyon County?
Yes. Minnesota Geospatial Commons publishes a parcel map of 16,401 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Lyon County's boundary or name changed?
Lyon County was created in 1869 from Redwood County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Lincoln County and Redwood County.
Is my lot in a flood zone?
We do not have flood maps for Lyon 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