San Antonio Public Library is reminding the community that all 26 San Antonio Public Library locations are designated as voter registration agencies. The deadline to register to vote in the May 10 Special Election is Thursday, April 10 (registration form must be postmarked by April 10). Every person of voting age, who applies in person for an original or renewal of a library card, will be given an opportunity to complete a voter registration application form. Already have a library card? Patrons can still register to vote at any location.