When was Clark County founded?

Clark County was founded in 1801, formed from Knox County, and named after George Rogers Clark.

What is the county seat of Clark County?

The county seat of Clark County is Jeffersonville.

Is there an online parcel map for Clark County?

Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 63,474 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Clark County's boundary or name changed?

Clark County was created in 1801 from Knox County. Since then the Atlas of Historical County Boundaries records 18 later changes, chiefly involving Floyd County, Washington County and Jefferson County.

Who issues septic and well permits in Clark County?

The county's page on septic systems and wells: Health department: septic and well.

Is my lot in a flood zone?

We do not have flood maps for Clark County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 18019

Clark CountyIndiana

Clark County is in Indiana with its seat at Jeffersonville. The county was created on February 3, 1801, from Knox County and was named after George Rogers Clark.

Founded1801
County seatJeffersonville
Named forGeorge Rogers Clark
Land area373 sq mi + 3.8 sq mi water
Population121,093 2020 Census
Parcels mapped63,474 checked 15 October 2026

Open the free map Click any parcel in Clark County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 20 October 2026

Census outline · seat marked

History

Formed in 1801 from Knox County

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

Clark County was created by Indiana Territory on February 3, 1801, from Knox County and initially included a small area of present Ohio near Fort Recovery. In 1803, Clark exchanged territory with Hamilton County, Ohio, eliminating its Ohio lands. The county lost significant territory to the creation of Dearborn, Harrison, Franklin, Jefferson, Wayne, Washington, Jackson, and Floyd Counties between 1803 and 1819.

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

1801
Clark County created Clark created by Indiana Territory from Knox; Clark included a small area of present Ohio near Ft. Recovery.
from Knox
3 February 1801 · Ind. Terr., Exec. Journal, 97
1803
Exchanged territory Clark exchanged with Hamilton (Ohio); Clark eliminated from Ohio.
with Hamilton
1 March 1803 · Ind. Terr., Exec. Journal, 114-115; Pence and Armstrong, 218; U.S. Stat., vol. 2, ch. 40 [1802], secs. 1-3/pp. 173-174; Van Zandt, 112
1803
Lost territory Clark lost to creation of Dearborn.
to Dearborn
7 March 1803 · Ind. Terr., Exec. Journal, 116
1808
Lost territory Clark lost to creation of Harrison.
to Harrison
1 December 1808 · Ind. Terr. Laws, 1801-1809, ch. 1/pp. 645-646
1816
Became part of Indiana Clark became a county in Indiana when the state of Indiana was created from Indiana Territory and small parts of Illinois and Michigan Territories. 11 December 1816 · U.S. Stat., vol. 3, ch. 57 [1816], secs. 1-2/p. 289 and res. 1 [1816]/p. 399; Van Zandt, 115

Show all 20 changes (15 more)

1801
Clark County created Clark created by Indiana Territory from Knox; Clark included a small area of present Ohio near Ft. Recovery.
from Knox
3 February 1801 · Ind. Terr., Exec. Journal, 97
1803
Exchanged territory Clark exchanged with Hamilton (Ohio); Clark eliminated from Ohio.
with Hamilton
1 March 1803 · Ind. Terr., Exec. Journal, 114-115; Pence and Armstrong, 218; U.S. Stat., vol. 2, ch. 40 [1802], secs. 1-3/pp. 173-174; Van Zandt, 112
1803
Lost territory Clark lost to creation of Dearborn.
to Dearborn
7 March 1803 · Ind. Terr., Exec. Journal, 116
1808
Lost territory Clark lost to creation of Harrison.
to Harrison
1 December 1808 · Ind. Terr. Laws, 1801-1809, ch. 1/pp. 645-646
1810
Lost territory Clark lost to Harrison.
to Harrison
10 December 1810 · Ind. Terr. Laws, 1809-1816, ch. 21/pp. 126-127
1811
Lost territory Clark lost to creation of Franklin, Jefferson, and Wayne; that part of Clark north of Grouseland Treaty line implicitly reverted to non-county status as Non-County Area 2.
to Franklin to Jefferson to Wayne
1 January 1811 · Ind. Terr. Laws, 1809-1816, chs. 6, 60/pp. 108-111, 190
1814
Lost territory Clark lost to creation of Washington.
to Washington
17 January 1814 · Ind. Terr. Laws, 1809-1816, ch. 10/pp. 446-448
1816
Lost territory Clark lost to creation of Jackson.
to Jackson
1 January 1816 · Ind. Terr. Laws, 1809-1816, ch. 1/pp. 601-603
1816
Became part of Indiana Clark became a county in Indiana when the state of Indiana was created from Indiana Territory and small parts of Illinois and Michigan Territories. 11 December 1816 · U.S. Stat., vol. 3, ch. 57 [1816], secs. 1-2/p. 289 and res. 1 [1816]/p. 399; Van Zandt, 115
1819
Lost territory Clark lost to creation of Floyd; a small fragment of Clark was left separate from rest of county by this creation.
to Floyd
1 February 1819 · Ind. Acts 1818, 3d sess., ch. 27, sec. 1/p. 99; Pence and Armstrong, 344
1820
Lost territory Clark lost to creation of Scott.
to Scott
1 February 1820 · Ind. Acts 1819, 4th sess., ch. 30, sec. 1/p. 51
1821
Lost territory Clark lost the small fragment to Floyd that was left separate from Clark by the creation of Floyd in 1819.
to Floyd
9 January 1821 · Ind. Acts 1820, 5th sess., ch. 46/p. 111
1836
Exchanged territory Clark exchanged with Jefferson.
with Jefferson
8 February 1836 · Ind. Acts 1835, 20th sess., gen., ch. 48/p. 80
1837
Lost territory Clark lost to Jefferson.
to Jefferson
2 February 1837 · Ind. Acts 1836, 21st sess., gen., ch. 52/p. 97
1839
Lost territory Clark lost small area to Scott.
to Scott
16 February 1839 · Ind. Acts 1838, 23d sess., loc., ch. 249/p. 323
1842
Gained territory Clark gained small area from Scott, exchanged with Washington, lost small area to Floyd.
from Scott from Washington from Floyd
5 December 1842 · 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
1844
Lost territory Clark lost small area to Floyd.
to Floyd
23 April 1844 · Pence and Armstrong, 350
1846
Exchanged territory Clark exchanged with Washington.
with Washington
14 January 1846 · Ind. Acts 1845, 30th sess., gen., ch. 110/p. 111
1873
Exchanged territory Clark exchanged with Washington.
with Washington
7 March 1873 · Ind. Acts 1873, 48th sess., ch. 40/p. 105
1979
Boundary clarified Boundary between Clark and Washington was redefined (no change).
with Washingtonno change
27 March 1979 · Ind. Acts 1979, 101st gen. assy., 1st reg. sess., pub. law no. 156/p. 714

Land and parcels

What the maps cover in Clark

Who publishes each layer, how good it is, and when we last checked.

Parcels Good enough

Lot lines and tax-map numbers for 63,474 parcels from Indiana Geographic Information Office (IndianaMap). Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 6 October 2026 · checked 15 October 2026
Address points Official

One point per address, 68,165 in all from Indiana Geographic Information Office (IGIO).
edited 8 March 2026 · checked 13 October 2026
Buildings Reference

Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026

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

Clark by the Census

Population

121,093 2020 Census count

Housing units

52,169 2020 Census count

Land area

373 square miles

Water area

3.8 square miles

People per sq mi

325 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

Assessor and property recordsfrom co.clark.in.us · checked 13 October 2026

Permits

Health department: septic and well 812-282-7521from co.clark.in.us · checked 13 October 2026

Zoning and code

Planning and zoningfrom co.clark.in.us · checked 13 October 2026
Ordinancesfrom co.clark.in.us
Added on 05/01/2015"> 2007 Ordinancesfrom co.clark.in.us
planning and zoningfrom co.clark.in.us
Zoning ordinancefrom co.clark.in.us

County government

County government
The official website of Clark County.
co.clark.in.us

See your own lot on these maps

Open Clark 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 Clark County

When was Clark County founded?: Clark County was founded in 1801, formed from Knox County, and named after George Rogers Clark.
What is the county seat of Clark County?: The county seat of Clark County is Jeffersonville.
Is there an online parcel map for Clark County?: Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 63,474 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Clark County's boundary or name changed?: Clark County was created in 1801 from Knox County. Since then the Atlas of Historical County Boundaries records 18 later changes, chiefly involving Floyd County, Washington County and Jefferson County.
Who issues septic and well permits in Clark County?: The county's page on septic systems and wells: Health department: septic and well.
Is my lot in a flood zone?: We do not have flood maps for Clark County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby