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County · code 18035

Delaware CountyIndiana

Delaware County is in Indiana with its county seat in Muncie. It was formed in 1827 from parts of Adams and Randolph counties and named after the Lenape people.

  • Founded1827
  • County seatMuncie
  • Named forLenape
  • Land area392 sq mi + 3.8 sq mi water
  • Population111,903 2020 Census
  • Parcels mapped59,990 checked 15 October 2026
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Updated

BlackfordHenryGrantJay Muncie Census outline · seat marked

Where it is

Delaware on the map of Indiana

Indiana has 92 counties and county equivalents, each with its own records office. Shapes with a page are links.

Adams CountyAllen CountyBartholomew CountyBenton CountyBlackford CountyBoone CountyBrown CountyCarroll CountyCass CountyClark CountyClay CountyClinton CountyCrawford CountyDaviess CountyDearborn CountyDecatur CountyDeKalb CountyDubois CountyElkhart CountyFayette CountyFloyd CountyFountain CountyFranklin CountyFulton CountyGibson CountyGrant CountyGreene CountyHamilton CountyHancock CountyHarrison CountyHendricks CountyHenry CountyHoward CountyHuntington CountyJackson CountyJasper CountyJay CountyJefferson CountyJennings CountyJohnson CountyKnox CountyKosciusko CountyLaGrange CountyLake CountyLaPorte CountyLawrence CountyMadison CountyMarion CountyMarshall CountyMartin CountyMiami CountyMonroe CountyMontgomery CountyMorgan CountyNewton CountyNoble CountyOhio CountyOrange CountyOwen CountyParke CountyPerry CountyPike CountyPorter CountyPosey CountyPulaski CountyPutnam CountyRandolph CountyRipley CountyRush CountySt. Joseph CountyScott CountyShelby CountySpencer CountyStarke CountySteuben CountySullivan CountySwitzerland CountyTippecanoe CountyTipton CountyUnion CountyVanderburgh CountyVermillion CountyVigo CountyWabash CountyWarren CountyWarrick CountyWashington CountyWayne CountyWells CountyWhite CountyWhitley CountyDelaware County Delaware
Counties of Indiana · Delaware highlighted

History

Formed in 1827 from Adams County and Randolph County

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

Delaware County was created on April 1, 1827, from part of the Delaware New Purchase, which was then attached to Randolph County. In 1828 and 1835, parts of the Adams New Purchase were attached to Delaware for administrative purposes, and in 1835 the county lost territory to the creation of Grant County. Jay County was fully organized and detached from Delaware in 1836, and Wells County followed in 1837.

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

  1. 1827
    Delaware County created Delaware created from part of Delaware New Purchase (later Adams New Purchase) attached to Randolph.
    from Adamsfrom Randolph
    · Ind. Acts 1826, 11th sess., ch. 10, secs. 1-2, 7/pp. 12-13
  2. 1828
    Changed Parts of Adams New Purchase were detached from Hamilton and Randolph, and attached to Delaware for administrative and judicial purposes.
    AdamsHamiltonRandolph
    · Ind. Acts 1827, 12th sess., ch. 10/p. 13
  3. 1831
    Lost territory Delaware lost part of Adams New Purchase attachment to creation of Grant. Boundaries of Adams New Purchase attached to Delaware were redefined (no change).
    to Adamsto Grant
    · Ind. Acts 1830, 15th sess., spec., ch. 12, secs. 1-2, 7-8/pp. 16-18
  4. 1835
    Lost territory Delaware lost Adams New Purchase attachment to creation of Jay and Wells; Jay and Wells not fully organized, parts attached to Delaware for administrative and judicial purposes.
    to Adamsto Jayto Wells
    · Ind. Acts 1834, 19th sess., gen., ch. 25, sec. 3/p. 44
  5. 1836
    Changed Jay fully organized, detached from Delaware.
    Jay
    · Ind. Acts 1835, 20th sess., gen., ch. 15/p. 47
  6. 1837
    Changed Wells fully organized, detached from Delaware.
    Wells
    · Ind. Acts 1836, 21st sess., gen., ch. 6/p. 59

Land and parcels

What the maps cover in Delaware

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

Delaware by the Census

Population
111,903 2020 Census count
Housing units
51,464 2020 Census count
Land area
392 square miles
Water area
3.8 square miles
People per sq mi
285 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

Delaware 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 Delaware County

When was Delaware County founded?
Delaware County was founded in 1827, formed from Adams County and Randolph County, and named after Lenape.
What is the county seat of Delaware County?
The county seat of Delaware County is Muncie.
Is there an online parcel map for Delaware County?
Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 59,990 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Delaware County's boundary or name changed?
Delaware County was created in 1827 from Adams County and Randolph County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Adams County, Jay County and Wells County.
Is my lot in a flood zone?
We do not have flood maps for Delaware 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