Hillsborough County Voter Registration
Hillsborough County, home to Tampa, is one of Florida's most politically competitive large counties with over 800,000 active voters. Located on Florida's Gulf Coast, it has been a reliable bellwether county — frequently reflecting the statewide winner in presidential and gubernatorial races.
Key Insights
Insight
Hillsborough is widely regarded as a bellwether county in Florida, with its election results often closely mirroring statewide outcomes.
Insight
The Tampa Bay metro area's rapid population growth has made Hillsborough one of the fastest-changing electorates in the state.
Insight
The county's mix of urban, suburban, and rural communities creates a diverse voter base that campaigns closely target and monitor.
Registration Trend
Active voter registration has grown by 3.2% since May 2025, a net change of 25,141 voters.
Party Leadership
Republican voters lead with 294,030 registrations, a margin of 19,817 (2.4%) over Democratic voters.
Fastest Moving Party
Other/NPA registration is the fastest growing party at +5.0% since May 2025.
Largest Age Group
The 36-45 age group is the largest voting bloc with 134,981 voters (16.5% of active registrations).
Party Switching
Republican voters have seen a net gain of 1,236 voters through party switches over the tracked period.
Momentum
Voter registration growth is accelerating — the latest month added 3,383 voters compared to 2,373 the prior month.