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County · code 55047

Green Lake CountyWisconsin

Green Lake County is a county in Wisconsin, formed in 1858 from Marquette County and seated in Green Lake.

  • Founded1858
  • County seatGreen Lake
  • Named forGreen Lake, Wisconsin
  • Land area350 sq mi + 31 sq mi water
  • Population19,018 2020 Census
  • Parcels mapped19,489 checked 16 October 2026
Open the free map Click any parcel in Green Lake County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MarquetteColumbiaFond du Lac Green Lake Census outline · seat marked

Where it is

Green Lake on the map of Wisconsin

Wisconsin has 72 counties and county equivalents, each with its own records office. Shapes with a page are links.

Adams CountyAshland CountyBarron CountyBayfield CountyBrown CountyBuffalo CountyBurnett CountyCalumet CountyChippewa CountyClark CountyColumbia CountyCrawford CountyDane CountyDodge CountyDoor CountyDouglas CountyDunn CountyEau Claire CountyFlorence CountyFond du Lac CountyForest CountyGrant CountyGreen CountyIowa CountyIron CountyJackson CountyJefferson CountyJuneau CountyKenosha CountyKewaunee CountyLa Crosse CountyLafayette CountyLanglade CountyLincoln CountyManitowoc CountyMarathon CountyMarinette CountyMarquette CountyMenominee CountyMilwaukee CountyMonroe CountyOconto CountyOneida CountyOutagamie CountyOzaukee CountyPepin CountyPierce CountyPolk CountyPortage CountyPrice CountyRacine CountyRichland CountyRock CountyRusk CountySt. Croix CountySauk CountySawyer CountyShawano CountySheboygan CountyTaylor CountyTrempealeau CountyVernon CountyVilas CountyWalworth CountyWashburn CountyWashington CountyWaukesha CountyWaupaca CountyWaushara CountyWinnebago CountyWood CountyGreen Lake County Green Lake
Counties of Wisconsin · Green Lake highlighted

History

Formed in 1858 from Marquette County

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

Green Lake County was created from Marquette County on June 8, 1858, and named after Green Lake. In 1860, the county gained additional territory from Marquette County, with the boundary demarcated later that year.

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

  1. 1858
    Green Lake County created Green Lake created from Marquette.
    from Marquette
    · HRS Wis., Origin, 127; Wis. Laws 1858, gen., ch. 17, secs. 1-2, 16/pp. 15-17, 20 and ch. 85, secs. 1-3, 10, 17/pp. 88-90, 94
  2. 1859
    Changed Legislature authorized Green Lake to gain township 16 north, range 14 east from Fond du Lac, dependent on local referendum that failed (no change).
    Fond du Lac
    · McKenna, I, 391; Wis. Laws 1859, gen., ch. 69, secs. 1-5/pp. 75-76
  3. 1860
    Gained territory Green Lake gained from Marquette. The boundary was demarcated later in 1860 and although it deviates in two small places from the legal description, the demarcated line is the modern boundary.
    from Marquette
    · Wis. Laws 1860, gen., ch. 143, secs. 1-2/pp. 126-127
  4. 1862
    Changed Legislature authorized Green Lake and Marquette to exchange small areas, dependent on local referendum that failed (no change).
    Marquette
    · HRS Wis., Origin, 127; Wis. Laws 1862, gen., ch. 23, secs. 1-2, 4-5/pp. 18-20
  5. 1865
    Changed Legislature authorized Green Lake to gain parts of townships 14 and 15 in range 10 east from Marquette, dependent on local referendum that failed (no change).
    Marquette
    · Kellogg, "Organization," 196; Wis. Laws 1865, gen., ch. 191, secs. 1, 3-4/pp. 172-173

Land and parcels

What the maps cover in Green Lake

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

Green Lake by the Census

Population
19,018 2020 Census count
Housing units
10,671 2020 Census count
Land area
350 square miles
Water area
31 square miles
People per sq mi
54 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

Green Lake 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

Open Green Lake 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 Green Lake County

When was Green Lake County founded?
Green Lake County was founded in 1858, formed from Marquette County, and named after Green Lake, Wisconsin.
What is the county seat of Green Lake County?
The county seat of Green Lake County is Green Lake.
Is there an online parcel map for Green Lake County?
Yes. A public source publishes a parcel map of 19,489 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Green Lake County's boundary or name changed?
Green Lake County was created in 1858 from Marquette County. Since then the Atlas of Historical County Boundaries records 1 later change, most of them small boundary adjustments, chiefly involving Marquette County.
Is my lot in a flood zone?
We do not have flood maps for Green Lake 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