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County · code 19091

Humboldt CountyIowa

Humboldt County is a county in Iowa with its seat in Dakota City. It was created in 1851 from Polk County and named after naturalist Alexander von Humboldt.

  • Founded1851
  • County seatDakota City
  • Named forAlexander von Humboldt
  • Land area434 sq mi + 1.3 sq mi water
  • Population9,597 2020 Census
  • Parcels mapped16,767 checked 15 October 2026
Open the free map Click any parcel in Humboldt County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

WebsterPocahontas Dakota City Census outline · seat marked

Where it is

Humboldt 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 · Humboldt highlighted

History

Formed in 1851 from Polk County

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

Humboldt County was created on January 15, 1851, from Non-County Area 9 attached to Polk County, though it was not fully organized at that time. The county was temporarily attached to Boone County in 1853 for administrative and judicial purposes. Humboldt lost all its territory to Kossuth and Webster counties in 1855 and was eliminated, but was re-created in 1857 from those same counties, gaining and then losing territory to Webster through 1860.

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

  1. 1851
    Humboldt County created Humboldt created from Non-County Area 9 attached to Polk; Humboldt not fully organized, not attached.
    from Polk
    · Iowa Acts 1850-1851, ch. 9, sec. 28/p. 34
  2. 1853
    Changed Humboldt attached to Boone for administrative and judicial purposes.
    Boone
    · Iowa Acts 1852-1853, ch. 12, sec. 1/p. 28
  3. 1855
    Lost territory Humboldt lost all territory to Kossuth and Webster; Humboldt eliminated.
    to Kossuthto Webster
    · Iowa Acts 1854-1855, ch. 141, secs. 1-2/p. 210
  4. 1857
    Humboldt County created Humboldt re-created from Kossuth and Webster.
    from Kossuthfrom Webster
    · Iowa Acts 1856-1857, ch. 147, secs. 1, 10/pp. 199-200
  5. 1858
    Gained territory Humboldt gained from Webster.
    from Webster
    · Iowa Acts 1858, ch. 42, secs. 1-2/pp. 49-50
  6. 1860
    Lost territory Humboldt lost to Webster when the state supreme court ruled the boundary change of 11 March 1858 unconstitutional.
    to Webster
    · Garver, "Establishment of Counties," 428-430; Iowa Reports, 12:1-14

Land and parcels

What the maps cover in Humboldt

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

Humboldt by the Census

Population
9,597 2020 Census count
Housing units
4,571 2020 Census count
Land area
434 square miles
Water area
1.3 square miles
People per sq mi
22 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

Humboldt 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

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Questions

Common questions about Humboldt County

When was Humboldt County founded?
Humboldt County was founded in 1851, formed from Polk County, and named after Alexander von Humboldt.
What is the county seat of Humboldt County?
The county seat of Humboldt County is Dakota City.
Is there an online parcel map for Humboldt County?
Yes. Humboldt County publishes a parcel map of 16,767 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Humboldt County's boundary or name changed?
Humboldt County was created in 1851 from Polk County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Webster County, Kossuth County and Boone County.
Is my lot in a flood zone?
We do not have flood maps for Humboldt 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