The county clerk's office spent Saturday mailing out ballots to residents qualified to vote by mail.
That includes those in the military serving overseas and voters age 65 or older.
The ballots are for the upcoming primary elections for the democratic and republican parties.
Harris County Clerk Stan Stanart says he considers a presidential election the super bowl of voting, and everyone should be involved.
"People should go look at the candidates. Study who they are and say what they represent. And Participate. Democracy works because people participate," Stanart said.
More than 17,000 ballots were mailed out Saturday.
Primary day is May 29 with early voting at the polls beginning in mid-May.