To register to vote in Guadalupe County, submit a completed, signed application to the county elections office; registration becomes effective 30 days after the office receives it.
The county’s voter registration page gives residents three ways to obtain an application: pick one up at an elections office, complete the Texas Secretary of State’s online form and print it, or call the county office to have a form mailed to you.
From the source record
Your voter registration will become effective 30 days after it is received.Guadalupe County Elections Office ↗
The Nov. 3, 2026 election is now too close for a new registration to become effective under that 30-day rule. Early voting in person ended Oct. 30, according to the county’s election calendar. Residents who are already registered can use the county’s election page to look for sample ballots and the Election Day schedule.
Register for a future election
The county lists two places to pick up and return an application: 3251 N. State Highway 123 in Seguin and 1101 Elbel Road in Schertz. After completing and signing the form, residents may return it to either office or mail it to P.O. Box 1346, Seguin, TX 78156. The county also links to the Secretary of State’s application. Completing that form online does not finish registration: the county says it must be printed, signed and mailed.