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County · code 17177

Stephenson CountyIllinois

Stephenson County is in Illinois and was formed in 1837, with Freeport as its county seat.

  • Founded1837
  • County seatFreeport
  • Named forBenjamin Stephenson
  • Land area564 sq mi + 0.5 sq mi water
  • Population44,630 2020 Census
Open the free map Click any parcel in Stephenson County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

Green, WICarrollOgleWinnebagoJo Daviess Freeport Census outline · seat marked

Where it is

Stephenson on the map of Illinois

Illinois has 102 counties and county equivalents, each with its own records office. Shapes with a page are links.

Adams CountyAlexander CountyBond CountyBoone CountyBrown CountyBureau CountyCalhoun CountyCarroll CountyCass CountyChampaign CountyChristian CountyClark CountyClay CountyClinton CountyColes CountyCook CountyCrawford CountyCumberland CountyDeKalb CountyDe Witt CountyDouglas CountyDuPage CountyEdgar CountyEdwards CountyEffingham CountyFayette CountyFord CountyFranklin CountyFulton CountyGallatin CountyGreene CountyGrundy CountyHamilton CountyHancock CountyHardin CountyHenderson CountyHenry CountyIroquois CountyJackson CountyJasper CountyJefferson CountyJersey CountyJo Daviess CountyJohnson CountyKane CountyKankakee CountyKendall CountyKnox CountyLake CountyLaSalle CountyLawrence CountyLee CountyLivingston CountyLogan CountyMcDonough CountyMcHenry CountyMcLean CountyMacon CountyMacoupin CountyMadison CountyMarion CountyMarshall CountyMason CountyMassac CountyMenard CountyMercer CountyMonroe CountyMontgomery CountyMorgan CountyMoultrie CountyOgle CountyPeoria CountyPerry CountyPiatt CountyPike CountyPope CountyPulaski CountyPutnam CountyRandolph CountyRichland CountyRock Island CountySt. Clair CountySaline CountySangamon CountySchuyler CountyScott CountyShelby CountyStark CountyTazewell CountyUnion CountyVermilion CountyWabash CountyWarren CountyWashington CountyWayne CountyWhite CountyWhiteside CountyWill CountyWilliamson CountyWinnebago CountyWoodford CountyStephenson County Stephenson
Counties of Illinois · Stephenson highlighted

History

Formed in 1837 from Jo Daviess County and Winnebago County

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

Stephenson County was created on March 4, 1837, from portions of Jo Daviess County and Winnebago County. The county was named after Benjamin Stephenson.

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

  1. 1837
    Stephenson County created Stephenson created from Jo Daviess and Winnebago.
    from Jo Daviessfrom Winnebago
    · Ill. Laws 1836-1837, pp. 96-100

Land and parcels

What the maps cover in Stephenson

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

Stephenson by the Census

Population
44,630 2020 Census count
Housing units
21,369 2020 Census count
Land area
564 square miles
Water area
0.5 square miles
People per sq mi
79 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

Zoning and code

County government

See your own lot on these maps

Open Stephenson 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 Stephenson County

When was Stephenson County founded?
Stephenson County was founded in 1837, formed from Jo Daviess County and Winnebago County, and named after Benjamin Stephenson.
What is the county seat of Stephenson County?
The county seat of Stephenson County is Freeport.
Is there an online parcel map for Stephenson County?
Not that we have found yet. Lot lines and owners of record are kept by the assessor's office. When a public parcel map appears, it shows here.
Has Stephenson County's boundary or name changed?
Stephenson County was created in 1837 from Jo Daviess County and Winnebago County. The Atlas of Historical County Boundaries records no boundary change since.
Is my lot in a flood zone?
We do not have flood maps for Stephenson 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