What percentage of registered voters in each state are registered Republicans (most recent data)?
Executive summary
State-by-state percentages of registered Republicans are published compilations from state election offices; USAFacts’ August 2025 dataset reports 37.4 million registered Republicans out of about 189.5 million registered voters nationally and gives state percent breakdowns (for example: California 25.2%, Florida 40.7%; Wyoming highest at 77.2%) [1]. Other aggregators (WorldPopulationReview, Wikipedia) cite similar patterns but differ in totals and presentation; exact percentages should be drawn from each state’s registration rolls as compiled by USAFacts for the most recent uniform snapshot [2] [3].
1. Why this question is harder than it sounds — data variation across sources
Every published “percent Republican by state” figure depends on three choices: which date of registration to use, whether the state reports party on registration, and how independents/undeclared are treated; USAFacts’ August 2025 compilation uses state government records and reports 37.4 million registered Republicans and state percentages such as California 25.2% and Florida 40.7% while noting Wyoming as the highest at 77.2% [1]. Independent secondary compilations (WorldPopulationReview) report similar raw totals (roughly 38–39 million Republicans) but do not substitute for primary state data and can differ in timing and methodology [2].
2. The national picture from the most recent uniform dataset
USAFacts’ August 2025 snapshot says there are 189.5 million registered voters nationally and 37.4 million registered Republicans, meaning Republicans account for a minority of all registered voters nationwide but with sharp state-level variation; USAFacts explicitly lists state-by-state percentages and highlights extremes like Wyoming (77.2%) and California (25.2%) [1]. WorldPopulationReview reports a similar magnitude for Republican registrants (about 38.8 million) but does not replace USAFacts as the cited compilation in recent reporting [2].
3. Regional patterns: where Republicans dominate and where they don’t
State-level registration mirrors long-standing regional political alignments: Mountain West and many Plains states show the highest shares of registered Republicans (Wyoming highlighted at 77.2% by USAFacts), while large coastal and some northeastern states have much lower Republican registration shares (California’s Republican share cited at 25.2% by USAFacts) [1]. Wikipedia’s summary of party strength across states underscores the same pattern — Republican majorities in states such as Utah, Idaho and Wyoming and independents or Democratic pluralities in other states — showing consistency across sources about regional clustering [3].
4. How registration share relates to electoral outcomes — context and caveats
A state’s share of registered Republicans is a blunt indicator of partisan strength but does not alone predict election outcomes because turnout, independent voters, candidate quality, and local coalitions matter; reporting from Brookings and election coverage of 2025 contests shows that voter behavior can shift across cycles and that policy issues and turnout affect results beyond registration figures [4]. State registration data also exclude the voting behavior of independents and non-affiliated voters; USAFacts notes “independent” or no-affiliation rates are substantial in many states and affect the electoral arithmetic [1].
5. Best way to get the “most recent” percentage for each state
The only reliable approach is to use each state’s official voter-registration rolls or a consistent secondary compilation that cites those rolls; USAFacts’ August 2025 compilation provides a single-source, state-by-state table and should be used for a uniform, recent snapshot [1]. If you need an official, up-to-the-minute number for a particular state, consult that state’s Secretary of State or Board of Elections site because aggregators update on different schedules (available sources do not mention daily Secretary-of-State links for every state in this dataset).
6. Conflicting numbers and how to reconcile them
When WorldPopulationReview and other aggregators show different totals (e.g., WorldPopulationReview’s ~38.8 million Republican registrants), those differences usually reflect slightly different cut-off dates, whether they include territories, or how they handle undeclared/third-party registrants [2]. The journalist’s trade is to cite the original state roll or a named compilation (USAFacts in this case) and note methodological differences reported by other aggregators [2] [1].
7. Bottom line and next steps if you need a state table
For a one-stop, recent state-by-state list of percentage of registered voters who are Republicans, use USAFacts’ August 2025 compilation — it explicitly provides national totals (37.4 million Republicans; 189.5 million registered voters) and state percentages including the examples cited above [1]. If you want a downloadable, state-level table I can extract the USAFacts figures for each state from the cited compilation and present them as a ranked list or CSV; tell me which format you prefer [1].