County · code 19113
Linn CountyIowa
Linn County is a county in Iowa with its seat in Cedar Rapids. It was created on December 21, 1837, from Dubuque and Jackson counties.
- Founded1837
- County seatCedar Rapids
- Named forLewis F. Linn
- Land area717 sq mi + 7.6 sq mi water
- Population230,299 2020 Census
- Parcels mapped104,295 checked 15 October 2026
Where it is
Linn on the map of Iowa
Iowa has 99 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1837 from Dubuque County and Jackson County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Linn County was created by Wisconsin Territory from Dubuque and Jackson counties on December 21, 1837, but was not fully organized and was temporarily attached to Jackson County. When Iowa Territory was created from Wisconsin Territory on July 3, 1838, Linn became an Iowa Territory county, and was fully organized and detached from Jackson on June 1, 1839. Linn became an Iowa county on December 28, 1846, when the state of Iowa was created from Iowa Territory.
- 1837Linn County created Linn created by Wisconsin Territory from Dubuque; Linn not fully organized, attached to Jackson "for temporary purposes." · Wis. Terr. Laws 1837, no. 6, secs. 9, 11/pp. 134-135
- 1838Became part of Iowa Linn became an Iowa Territory county when Iowa Territory was created from Wisconsin Territory. · U.S. Stat., vol. 5, ch. 96[1838]/pp. 235-241
- 1839
- 1846Lost territory Linn lost part of attached Non-County Area 7 to creation of Marshall, Story. · Iowa Terr. Laws 1845-1846, ch. 82, secs. 5, 7-8/pp. 74
- 1846Became part of Iowa Linn became an Iowa county when the state of Iowa was created from Iowa Territory. · U.S. Stat., vol. 9, ch. 1[1847]/p. 117
Show all 8 changes
- 1837Linn County created Linn created by Wisconsin Territory from Dubuque; Linn not fully organized, attached to Jackson "for temporary purposes." · Wis. Terr. Laws 1837, no. 6, secs. 9, 11/pp. 134-135
- 1838Became part of Iowa Linn became an Iowa Territory county when Iowa Territory was created from Wisconsin Territory. · U.S. Stat., vol. 5, ch. 96[1838]/pp. 235-241
- 1839
- 1840
- 1843Changed Tama and Non-County Area 7 attached to Linn "for judicial, revenue, and election purposes." · Iowa Terr. Rev. Stat. 1843, ch. 34, secs. 5-6, 8-11/pp. 132-134
- 1846Lost territory Linn lost part of attached Non-County Area 7 to creation of Marshall, Story. · Iowa Terr. Laws 1845-1846, ch. 82, secs. 5, 7-8/pp. 74
- 1846Changed Non-County Area 7 detached from Linn, became part of Non-County Areas 6 and 9. · Iowa Terr. Laws 1845-1846, ch. 96, secs. 1, 11, 18/pp. 86-88; ch. 101, secs. 1, 11-12/pp. 92-95
- 1846Became part of Iowa Linn 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 Linn
Who publishes each layer, how good it is, and when we last checked.
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Parcels Fallback
Lot lines and tax-map numbers for 104,295 parcels from Iowa Department of Homeland Security and Emergency Management (statewide parcels, mirrored by the University of Iowa). Drawn for tax purposes: usually within a few feet of a survey, but not a survey. This copy is a fallback, not the county's own: use it as a guide and check the official record.
edited 10 May 2024 · checked 15 October 2026 -
Address points Missing
No public address points layer found for Linn County yet.
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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
Linn by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
See your own lot on these maps
Open Linn 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.
Questions
Common questions about Linn County
- When was Linn County founded?
- Linn County was founded in 1837, formed from Dubuque County and Jackson County, and named after Lewis F. Linn.
- What is the county seat of Linn County?
- The county seat of Linn County is Cedar Rapids.
- Is there an online parcel map for Linn County?
- Yes. Iowa Department of Homeland Security and Emergency Management (statewide parcels, mirrored by the University of Iowa) publishes a parcel map of 104,295 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Linn County's boundary or name changed?
- Linn County was created in 1837 from Dubuque County and Jackson County. Since then the Atlas of Historical County Boundaries records 7 later changes, chiefly involving Jackson County, Benton County and Marshall County.
- Is my lot in a flood zone?
- We do not have flood maps for Linn County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby