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County · code 17179

Tazewell CountyIllinois

Tazewell County is located in Illinois and was created in 1827 from territory belonging to Peoria and Shelby counties. The county seat is Pekin.

  • Founded1827
  • County seatPekin
  • Named forLittleton Waller Tazewell
  • Land area646 sq mi + 12 sq mi water
  • Population131,343 2020 Census
  • Parcels mapped68,085 checked 15 October 2026
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Updated

PeoriaLoganWoodfordMasonMcLeanFulton Pekin Census outline · seat marked

Where it is

Tazewell 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 CountyStephenson CountyUnion CountyVermilion CountyWabash CountyWarren CountyWashington CountyWayne CountyWhite CountyWhiteside CountyWill CountyWilliamson CountyWinnebago CountyWoodford CountyTazewell County Tazewell
Counties of Illinois · Tazewell highlighted

History

Formed in 1827 from Peoria County and Shelby County

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

Tazewell County was named after Littleton Waller Tazewell and formed from Peoria and Shelby counties on January 31, 1827. From 1830 to 1841, the county lost territory to the creation of McLean, Putnam, La Salle, Logan, Mason, and Woodford counties.

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

  1. 1827
    Tazewell County created Tazewell created from Non-County Area 6 attached to Peoria and Non-County Area 7 attached to Shelby. Non-County Area 6 gained from Non-County Area 7, was detached from Peoria, attached to Tazewell for administrative and judicial purposes.
    from Peoriafrom Shelby
    · Ill. Rev. Code 1826-1827, pp.113-115; Ill. Rev. Code 1828-1829, p. 32
  2. 1830
    Lost territory Tazewell lost to creation of McLean and lost part of attached Non-County Area 6 to creation of McLean.
    to McLean
    · Ill. Laws 1830-1831, pp. 57-59
  3. 1831
    Lost territory Tazewell lost all of attached Non-County Area 6 to Putnam and to the creation of La Salle; Non-County Area 6 eliminated.
    to Putnamto La Salle
    · Ill. Laws 1830-1831, pp. 54-57, 62-63
  4. 1840
    Lost territory Tazewell lost to Logan.
    to Logan
    · Ill. Laws 1839-1840, spec. sess., p. 29
  5. 1841
    Lost territory Tazewell lost to creation of Mason.
    to Mason
    · Ill. Laws 1840-1841, pp. 69-71
  6. 1841
    Lost territory Tazewell lost to creation of Woodford.
    to Woodford
    · Ill. Laws 1840-1841, pp. 84-86
  7. 1843
    Changed Legislature authorized Woodford to gain from Tazewell all of township 26 north, east of the Illinois River (except for small area around East Peoria), dependent on local referendum that failed (no change).
    Woodford
    · Ill. Laws 1842-1843, pp. 86-88

Land and parcels

What the maps cover in Tazewell

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

Tazewell by the Census

Population
131,343 2020 Census count
Housing units
58,550 2020 Census count
Land area
646 square miles
Water area
12 square miles
People per sq mi
203 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

Tazewell 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 Tazewell County

When was Tazewell County founded?
Tazewell County was founded in 1827, formed from Peoria County and Shelby County, and named after Littleton Waller Tazewell.
What is the county seat of Tazewell County?
The county seat of Tazewell County is Pekin.
Is there an online parcel map for Tazewell County?
Yes. Tazewell County publishes a parcel map of 68,085 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Tazewell County's boundary or name changed?
Tazewell County was created in 1827 from Peoria County and Shelby County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving La Salle County, Logan County and Mason County.
Is my lot in a flood zone?
We do not have flood maps for Tazewell 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