Longoria issued her resignation during the Harris County Commissioners' Court on Tuesday. Her resignation will be effective as of July 1.
"I didn't meet my own standards, nor the standards set by commissioner's court," she said.
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Over the weekend, it was revealed that 6,000 Democratic votes and 4,000 Republican votes did not get counted last Tuesday.
Those votes will be added to the official count, but both parties want to know how this happened, and how to keep it from happening again in the upcoming runoffs and in November during the General Election.
ABC13 spoke with a Republican precinct judge who also had issues during the primary. She, too, is concerned about future elections in the county.
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"I have 1,400 voters that usually vote at this location, and we couldn't even get 580 through, and we were open until 9 o'clock," LaDonna Lubeck said. "We were sending them wherever they needed to go to go vote somewhere else."
A review is underway within the county to get some answers about the missing ballots. We expect to hear directly from Longoria during Tuesday's meeting.