Houston ? Annise Parker made history Saturday by becoming Houston’s first openly gay mayor, seizing 53.6 percent of the vote in the city’s hotly contested election.

“This election has changed the world for the gay, lesbian, bisexual and transgendered community. Just as it is about transforming the lives of all Houstonians for the better, and that’s what my administration will be about,” Parker told supporters after former city attorney Gene Locke conceded defeat.

Of the more than 152,000 residents who turned out to cast ballots in the fourth largest U.S. city Saturday, 81,652 chose Parker — some 11,000 votes more than were placed for Locke.