The official count of the ballots cast in Medina County for the 2008 general election shows that 90,652 voters voted, which represented a turnout of 70.76%. In 2004, the number of voters in the general election in Medina County was 86,016, which represented 72.73% of registered voters.
In the 2004 general election, Bush received 48,196 votes and Kerry received 36,272 votes. In the 2008 general election, McCain received 48,189 and Obama received 40,924. Those figures would seem to indicate that nearly all of Medina County's growth in voters were Obama supporters.