Parcel Chartplaces Open the free map

County · code 18029

Dearborn CountyIndiana

Dearborn County is located in Indiana and was originally created in 1803 from Clark County as part of Indiana Territory. The county seat is Lawrenceburg.

  • Founded1803
  • County seatLawrenceburg
  • Named forHenry Dearborn
  • Land area305 sq mi + 2.3 sq mi water
  • Population50,679 2020 Census
  • Parcels mapped32,462 checked 15 October 2026
Open the free map Click any parcel in Dearborn County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

OhioFranklinRipleyBoone, KYHamilton, OHButler, OH Lawrenceburg Census outline · seat marked

Where it is

Dearborn 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 CountyDecatur CountyDeKalb CountyDelaware 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 CountyDearborn County Dearborn
Counties of Indiana · Dearborn highlighted

History

Formed in 1803 from Clark County

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

Dearborn County was created on March 7, 1803, from Clark County by Indiana Territory. The county was named after Henry Dearborn. Dearborn County became part of the state of Indiana on December 11, 1816, when Indiana was created from Indiana Territory. Over the following decades, the county lost territory to the creation of Franklin, Jefferson, Wayne, Ripley, and Ohio counties.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1803
    Dearborn County created Dearborn created by Indiana Territory from Clark.
    from Clark
    · Ind. Terr., Exec. Journal, 116
  2. 1811
    Lost territory Dearborn lost to creation of Franklin, Jefferson, and Wayne.
    to Franklinto Jeffersonto Wayne
    · Ind. Terr. Laws, 1809-1816, chs. 6, 60/pp. 108-111, 190
  3. 1814
    Gained territory Dearborn gained from Jefferson, lost to creation of Switzerland.
    from Jeffersonfrom Switzerland
    · Ind. Terr. Laws, 1809-1816, ch. 9/pp. 538-542
  4. 1816
    Became part of Indiana Dearborn became a county in Indiana when the state of Indiana was created from Indiana Territory and small parts of Illinois and Michigan Territories. · U.S. Stat., vol. 3, ch. 57 [1816], secs. 1-2/p. 289 and res. 1 [1816]/p. 399; Van Zandt, 115
  5. 1816
    Lost territory Dearborn lost to creation of Ripley; Ripley not fully organized, part attached to Dearborn for administrative and judicial purposes.
    to Ripley
    · Ind. Acts 1816, 1st sess., ch. 45, sec. 10/p. 199
Show all 11 changes (6 more)
  1. 1803
    Dearborn County created Dearborn created by Indiana Territory from Clark.
    from Clark
    · Ind. Terr., Exec. Journal, 116
  2. 1811
    Lost territory Dearborn lost to creation of Franklin, Jefferson, and Wayne.
    to Franklinto Jeffersonto Wayne
    · Ind. Terr. Laws, 1809-1816, chs. 6, 60/pp. 108-111, 190
  3. 1814
    Gained territory Dearborn gained from Jefferson, lost to creation of Switzerland.
    from Jeffersonfrom Switzerland
    · Ind. Terr. Laws, 1809-1816, ch. 9/pp. 538-542
  4. 1816
    Became part of Indiana Dearborn became a county in Indiana when the state of Indiana was created from Indiana Territory and small parts of Illinois and Michigan Territories. · U.S. Stat., vol. 3, ch. 57 [1816], secs. 1-2/p. 289 and res. 1 [1816]/p. 399; Van Zandt, 115
  5. 1816
    Lost territory Dearborn lost to creation of Ripley; Ripley not fully organized, part attached to Dearborn for administrative and judicial purposes.
    to Ripley
    · Ind. Acts 1816, 1st sess., ch. 45, sec. 10/p. 199
  6. 1818
    Changed Ripley fully organized, detached from Dearborn.
    Ripley
    · Ind. Acts 1817, 2d sess., spec., ch. 13/p. 32
  7. 1842
    Boundary clarified Dearborn boundaries were redefined; mistake in description corrected 13 January 1845 (no change).
    no change
    · Ind. Rev. Stat. 1843, ch. 2, secs. 2, 26, 28-31, 36-37, 42-44, 61, 67, 77, 80-82, 85-86/pp. 68, 74-81, 84, 86, 88-89
  8. 1844
    Lost territory Dearborn lost to creation of Ohio; Ohio not fully organized, attached to Dearborn for administrative and judicial purposes.
    to Ohio
    · Ind. Acts 1843, 28th sess., gen., ch. 2, secs. 1, 13/pp. 7, 9
  9. 1844
    Changed Ohio fully organized, detached from Dearborn.
    Ohio
    · Ind. Acts 1843, 28th sess., gen., ch. 2, sec. 4/p. 7
  10. 1845
    Lost territory Dearborn lost to Ohio.
    to Ohio
    · Ind. Acts 1844, 29th sess., loc., ch. 230, secs. 1-2/p. 225
  11. 1845
    Boundary clarified Dearborn boundaries were clarified, correcting mistake of 5 December 1842 (no change).
    no change
    · Ind. Acts 1844, 29th sess., loc., ch. 107/p. 136

Land and parcels

What the maps cover in Dearborn

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

Dearborn by the Census

Population
50,679 2020 Census count
Housing units
20,845 2020 Census count
Land area
305 square miles
Water area
2.3 square miles
People per sq mi
166 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

Dearborn 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 Dearborn 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.

Open the free map no sign-in Pro early access

Questions

Common questions about Dearborn County

When was Dearborn County founded?
Dearborn County was founded in 1803, formed from Clark County, and named after Henry Dearborn.
What is the county seat of Dearborn County?
The county seat of Dearborn County is Lawrenceburg.
Is there an online parcel map for Dearborn County?
Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 32,462 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Dearborn County's boundary or name changed?
Dearborn County was created in 1803 from Clark County. Since then the Atlas of Historical County Boundaries records 8 later changes, chiefly involving Ohio County, Jefferson County and Ripley County.
Is my lot in a flood zone?
We do not have flood maps for Dearborn 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