Word.ws English Dictionary

O'Brien County

O'Brien County proper noun: one of 99 counties in Iowa, United States. County seat: Primghar.

Proper noun

O'Brien County

  1. One of 99 counties in Iowa, United States. County seat: Primghar.

Origin of O'Brien County

Named after William Smith O'Brien.

Questions about O'Brien County

What does O'Brien County mean?
O'Brien County means one of 99 counties in Iowa, United States. County seat: Primghar.
What part of speech is O'Brien County?
O'Brien County is a proper noun.

Words near O'Brien County in the dictionary

  1. O'Biden
  2. O'Bonsawin
  3. O'Boyle
  4. O'Brian
  5. O'Brien
  6. O'Brien County
  7. O'Brien potatoes
  8. O'Briens
  9. O'Bummer
  10. O'Callaghan
  11. O'Casey

Source and license

Adapted from Wiktionary: O'Brien County (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “O'Brien County.” Word.ws, https://word.ws/o%27brien_county. Based on Wiktionary, CC BY-SA 4.0.