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County · code 31143

Polk CountyNebraska

Polk County is a county in Nebraska, formed on January 26, 1856, with its seat at Osceola.

  • Founded1856
  • County seatOsceola
  • Named forJames K. Polk
  • Land area439 sq mi + 2 sq mi water
  • Population5,214 2020 Census
  • Parcels mapped5,726 checked 15 October 2026
Open the free map Click any parcel in Polk County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

YorkPlatteButlerMerrickHamilton Osceola Census outline · seat marked

Where it is

Polk on the map of Nebraska

Nebraska has 93 counties and county equivalents, each with its own records office. Shapes with a page are links.

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Counties of Nebraska · Polk highlighted

History

Formed in 1856 from York County

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

Polk County was created by Nebraska Territory from York County and non-county area, though it was not fully organized at that time. In 1858, Polk County lost territory to the creation of Merrick County, which included the part of the Pawnee Indian Reservation that had overlapped Polk. The county lost additional area north of the Platte River to Platte County in 1865, and was finally fully organized on August 6, 1870.

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

  1. 1856
    Polk County created Polk created by Nebraska Territory from York and non-county area; Polk not fully organized.
    from York
    · Neb. Terr. Laws 1855-1856, 2d reg. sess., sec. 5/p. 200
  2. 1857
    Changed The Pawnee Indians ceded most of their land to the U.S. The remaining Pawnee Indian Reservation overlapped part of Polk.
    U.s.
    · Royce, pp. 818-819, pl. 148
  3. 1858
    Lost territory Polk lost to creation of Merrick (spelled Merick here). Loss included the part of the Pawnee Indian Reservation that overlapped Polk.
    to Merrickto Merick
    · Neb. Terr. Laws 1858, 5th reg. sess., p. 398
  4. 1862
    Changed Part of Polk north of the Platte River was attached to Platte "for election, judicial, and revenue purposes."
    Platte
    · Neb. Terr. Laws 1861-1862, 8th reg. sess., p. 121
  5. 1865
    Lost territory Polk lost to Platte. The area had been attached to Platte 10 January 1862.
    to Platte
    · Neb. Terr. Laws 1865, 10th reg. sess., p. 134
  6. 1870
    Changed Polk fully organized. · History of Neb., 1283
  7. 1873
    Changed Polk boundary with Merrick shifted from the south bank to the middle of the south channel of the Platte River.
    Merrick
    · Neb. Laws 1873, 9th sess., pp. 57-58

Land and parcels

What the maps cover in Polk

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

Polk by the Census

Population
5,214 2020 Census count
Housing units
2,524 2020 Census count
Land area
439 square miles
Water area
2 square miles
People per sq mi
12 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

Polk 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 Polk County

When was Polk County founded?
Polk County was founded in 1856, formed from York County, and named after James K. Polk.
What is the county seat of Polk County?
The county seat of Polk County is Osceola.
Is there an online parcel map for Polk County?
Yes. A public source publishes a parcel map of 5,726 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Polk County's boundary or name changed?
Polk County was created in 1856 from York County. Since then the Atlas of Historical County Boundaries records 6 later changes, chiefly involving Merrick County, Platte County and Merick County.
Is my lot in a flood zone?
We do not have flood maps for Polk 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