When was Madison County founded?

Madison County was founded in 1823, formed from Delaware County, Adams County and Marion County, and named after James Madison.

What is the county seat of Madison County?

The county seat of Madison County is Anderson.

Is there an online parcel map for Madison County?

Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 84,020 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Madison County's boundary or name changed?

Madison County was created in 1823 from Delaware County, Adams County and Marion County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Adams County, Delaware County and Grant County.

Is my lot in a flood zone?

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

County · code 18095

Madison CountyIndiana

Madison County is a county in Indiana with its seat in Anderson, formed in 1823.

Founded1823
County seatAnderson
Named forJames Madison
Land area452 sq mi + 1 sq mi water
Population130,129 2020 Census
Parcels mapped84,020 checked 15 October 2026

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

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1823 from Delaware County, Adams County and Marion County

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

Madison County was created in 1823 from parts of Delaware, Adams, and Marion counties. The county was named after James Madison. Over the following years, Madison County gained and lost land through various boundary adjustments and the creation of nearby counties, including Hancock and Grant.

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

1823
Madison County created Madison created from the unattached part of Delaware New Purchase (later Adams New Purchase) and from part of Delaware New Purchase attached to Marion.
from Delaware from Adams from Marion
1 July 1823 · Ind. Acts 1822, 7th sess., ch. 50, sec. 1/p. 94
1824
Lost territory Madison lost to Delaware New Purchase (later Adams New Purchase).
to Delaware to Adams
26 January 1824 · Ind. Acts 1823, 8th sess., spec., ch. 28/p. 51
1827
Gained territory Madison gained from parts of Delaware New Purchase (later Adams New Purchase) attached to Hamilton and Randolph, lost to creation of Hancock. Hancock not fully organized, attached to Madison for administrative and judicial purposes.
from Delaware from Adams from Hamilton from Randolph from Hancock
26 January 1827 · Ind. Acts 1826, 11th sess., ch. 91/p. 84
1831
Gained territory Madison gained from part of Adams New Purchase, lost to creation of Grant.
from Adams from Grant
1 April 1831 · Ind. Acts 1830, 15th sess., spec., ch. 12, secs. 1-2, 7-8/pp. 16-18
1838
Gained territory Madison gained from Grant.
from Grant
17 February 1838 · Ind. Acts 1837, 22d sess., loc., ch. 62/p. 266

Show all 8 changes (3 more, mostly small adjustments)

1823
Madison County created Madison created from the unattached part of Delaware New Purchase (later Adams New Purchase) and from part of Delaware New Purchase attached to Marion.
from Delaware from Adams from Marion
1 July 1823 · Ind. Acts 1822, 7th sess., ch. 50, sec. 1/p. 94
1824
Lost territory Madison lost to Delaware New Purchase (later Adams New Purchase).
to Delaware to Adams
26 January 1824 · Ind. Acts 1823, 8th sess., spec., ch. 28/p. 51
1826
Boundary clarified Northern boundary of Madison was redefined (no change).
no change
13 January 1826 · Ind. Acts 1825, 10th sess., ch. 73, secs. 3-4/p. 81
1827
Gained territory Madison gained from parts of Delaware New Purchase (later Adams New Purchase) attached to Hamilton and Randolph, lost to creation of Hancock. Hancock not fully organized, attached to Madison for administrative and judicial purposes.
from Delaware from Adams from Hamilton from Randolph from Hancock
26 January 1827 · Ind. Acts 1826, 11th sess., ch. 91/p. 84
1828
Changed Hancock fully organized, detached from Madison.
Hancock
1 March 1828 · Ind. Acts 1827, 12th sess., ch. 15/p. 19
1831
Gained territory Madison gained from part of Adams New Purchase, lost to creation of Grant.
from Adams from Grant
1 April 1831 · Ind. Acts 1830, 15th sess., spec., ch. 12, secs. 1-2, 7-8/pp. 16-18
1833
Boundary clarified Boundaries of Madison with Hancock and Henry were redefined (no change).
with Hancock with Henryno change
15 January 1833 · Ind. Acts 1832, 17th sess., ch. 20/p. 20
1838
Gained territory Madison gained from Grant.
from Grant
17 February 1838 · Ind. Acts 1837, 22d sess., loc., ch. 62/p. 266

Land and parcels

What the maps cover in Madison

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

Parcels Good enough

Lot lines and tax-map numbers for 84,020 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, 64,156 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

Madison by the Census

Population

130,129 2020 Census count

Housing units

58,784 2020 Census count

Land area

452 square miles

Water area

1 square miles

People per sq mi

288 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

Madison County's official site

We have found the county's site but not its offices yet; start there.

County government

County government
The official website of Madison County.
madisoncty.com

See your own lot on these maps

Open Madison 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 Madison County

When was Madison County founded?: Madison County was founded in 1823, formed from Delaware County, Adams County and Marion County, and named after James Madison.
What is the county seat of Madison County?: The county seat of Madison County is Anderson.
Is there an online parcel map for Madison County?: Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 84,020 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Madison County's boundary or name changed?: Madison County was created in 1823 from Delaware County, Adams County and Marion County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Adams County, Delaware County and Grant County.
Is my lot in a flood zone?: We do not have flood maps for Madison County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby