The California Voter File is a massive and constantly changing dataset. At the end of the 2012 election cycle, it grew to over 18 million voters. But with recent purges from county election files, it has dropped down to its current 17 million. As we near a major statewide election, we expect to see an uptick in registration and growth of the overall voter file. The state’s registration is likely — again — to exceed 18 million, and potentially even reach 19 million by November.