As of August 2025, there are approximately 6,601,189 likely registered Republicans in Texas. This number comes from a modeling approach used by L2 Data, the leading independent voter data and technology firm, because Texas does not require voters to register by party. Instead, party affiliation is inferred from primary election participation and other data points. According to L2's model, about 37.75% of Texas voters are likely Republican, while 46.5% are likely Democrat, and 15.7% are unaffiliated or nonpartisan voters.

Key Context on Texas Voter Registration

• Texas is an open primary state and does not register voters by party affiliation formally.
• Party affiliation is derived from voter participation in partisan primary elections and additional analytic modeling.
• The total number of registered voters in Texas is around 17.5 million.
• Republicans make up about 6.6 million registered or likely affiliated voters, Democrats about 8.1 million, and about 2.75 million identified as unaffiliated.

These modeled numbers are widely used to estimate the partisan makeup of Texas voters despite the absence of formal party registration by the state. This explains that while Republicans constitute a substantial portion of Texas voters, Democrats are modeled to hold a slight edge in affiliation, but Republican turnout and voting behavior may differ, influencing actual election outcomes.