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County · code 19115

Louisa CountyIowa

Louisa County is a county in Iowa, with its county seat in Wapello. It was created on December 7, 1836, from Des Moines County.

  • Founded1836
  • County seatWapello
  • Land area402 sq mi + 16 sq mi water
  • Population10,837 2020 Census
  • Parcels mapped13,617 checked 15 October 2026
Open the free map Click any parcel in Louisa County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MuscatineDes MoinesWashingtonMercer, ILJohnsonRock Island, IL Wapello Census outline · seat marked

Where it is

Louisa on the map of Iowa

Iowa has 99 counties and county equivalents, each with its own records office. Shapes with a page are links.

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Counties of Iowa · Louisa highlighted

History

Formed in 1836 from Des Moines County

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

Louisa County was created by Wisconsin Territory from Des Moines County in 1836. In 1838, it gained land from Muscatine County, while also losing territory to Des Moines County, Henry County, and the newly created Slaughter County, which was later renamed Washington County. When Iowa Territory was established from Wisconsin Territory in 1838, Louisa became a county within the territory, and it later became an Iowa county when the state was created in 1846.

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

  1. 1836
    Louisa County created Louisa created by Wisconsin Territory from Des Moines.
    from Des Moines
    · Wis. Terr. Laws 1836, no. 21, sec. 5/pp. 77-78
  2. 1838
    Gained territory Louisa gained from Muscatine, lost to Des Moines and Henry, and lost to creation of Slaughter (now Washington).
    from Muscatinefrom Des Moinesfrom Henryfrom Slaughterfrom Washington
    · Wis. Terr. Laws 1837, no. 67, secs. 1-7/pp. 381-384
  3. 1838
    Became part of Iowa Louisa became an Iowa Territory county when Iowa Territory was created from Wisconsin Territory. · U.S. Stat., vol. 5, ch. 96[1838]/pp. 235-241
  4. 1839
    Gained territory Louisa gained from Slaughter (now Washington).
    from Slaughterfrom Washington
    · Iowa Terr. Laws 1838-1839, pp. 89-91
  5. 1846
    Became part of Iowa Louisa became an Iowa county when the state of Iowa was created from Iowa Territory. · U.S. Stat., vol. 9, ch. 1[1847]/p. 117

Land and parcels

What the maps cover in Louisa

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

Louisa by the Census

Population
10,837 2020 Census count
Housing units
4,712 2020 Census count
Land area
402 square miles
Water area
16 square miles
People per sq mi
27 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.

Zoning and code

County government

See your own lot on these maps

Open Louisa 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.

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Questions

Common questions about Louisa County

When was Louisa County founded?
Louisa County was founded in 1836, formed from Des Moines County.
What is the county seat of Louisa County?
The county seat of Louisa County is Wapello.
Is there an online parcel map for Louisa County?
Yes. Louisa County publishes a parcel map of 13,617 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Louisa County's boundary or name changed?
Louisa County was created in 1836 from Des Moines County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Slaughter County, Washington County and Des Moines County.
Is my lot in a flood zone?
We do not have flood maps for Louisa 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