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O'Brien County, IA

The certified 2024 map, county by county — O'Brien in amber. Open it and every precinct inside is yours to model.

Model O'Brien County, precinct by precinct →

Iowa by certified 2024 presidential result · O'Brien County in amber · open the live map →

2024 president

Republican R+60.9

Votes cast

7,501

State

Iowa

Grain

Precinct-level

Frequently asked

How did O'Brien County vote in 2024?
R+60.9 for president — 1,428 Democratic · 5,998 Republican of 7,501 votes.
Can I model O'Brien County precinct by precinct?
Yes — open the county in the simulator and every precinct inside it is editable, with real 2024 returns as the baseline. The county rolls up live into its statewide races.
What races cover O'Brien County?
Every statewide race (U.S. Senate, Governor, the executive offices) plus its U.S. House and state-legislature districts — all modelable from the same county baseline.

Every county in Iowa

AdairAdamsAllamakeeAppanooseAudubonBentonBlack HawkBooneBremerBuchananBuena VistaButlerCalhounCarrollCassCedarCerro GordoCherokeeChickasawClarkeClayClaytonClintonCrawfordDallasDavisDecaturDelawareDes MoinesDickinsonDubuqueEmmetFayetteFloydFranklinFremontGreeneGrundyGuthrieHamiltonHancockHardinHarrisonHenryHowardHumboldtIdaIowaJacksonJasperJeffersonJohnsonJonesKeokukKossuthLeeLinnLouisaLucasLyonMadisonMahaskaMarionMarshallMillsMitchellMononaMonroeMontgomeryMuscatineOsceolaPagePalo AltoPlymouthPocahontasPolkPottawattamiePoweshiekRinggoldSacScottShelbySiouxStoryTamaTaylorUnionVan BurenWapelloWarrenWashingtonWayneWebsterWinnebagoWinneshiekWoodburyWorthWright

The races above this county

Iowa U.S. Senate · Governor · the 2026 Senate board · the 2026 House board