San Antonio Municipal Elections and Ballot Measures Explained
San Antonio conducts municipal elections governed by a combination of Texas state election law and the City Charter, determining who fills elected offices and whether proposed charter amendments or bond packages advance. Understanding how these elections are structured — from candidate filing deadlines to the mechanics of runoffs and ballot propositions — shapes how residents engage with local governance. This page covers the definition of municipal elections in the San Antonio context, the procedural steps that move a measure from proposal to result, the most common election scenarios residents encounter, and the boundaries between city-controlled processes and state-administered rules.
Definition and scope
A San Antonio municipal election is any election called by the City of San Antonio to fill a city office or to place a proposition before voters for approval or rejection. Elected offices subject to municipal elections include the Mayor and the 10 City Council districts described in detail on the San Antonio City Council Structure page. Ballot measures cover charter amendments, bond authorizations, and other propositions placed by the City Council.
Scope and coverage limitations: This page addresses elections administered under the authority of the City of San Antonio and governed primarily by the Texas Election Code (Texas Secretary of State, Elections Division) and the San Antonio City Charter. Elections for Bexar County offices, state legislative seats, U.S. congressional positions, school board elections, and special district elections are not covered here — those fall under separate jurisdictional authority. The relationship between city and county governance is addressed separately at Bexar County and San Antonio Relationship. Voters registered in San Antonio may participate in both city and county elections on the same ballot day, but each election type operates under its own administrative chain.
How it works
San Antonio municipal elections follow a structured sequence governed by the Texas Election Code and the City Charter.
1. Candidate filing period
Candidates for Mayor or City Council must file a completed application with the City Clerk during a designated filing window, which the Texas Election Code sets at between the 30th and 62nd days before the filing deadline for general elections (Texas Election Code §141.040). Candidates pay a filing fee or submit a petition with qualifying signatures in lieu of a fee.
2. Uniform Election Dates
Texas law requires that most municipal elections occur on one of four Uniform Election Dates per calendar year — the second Saturday of February, the first Saturday of May, the third Saturday of August, or the first Tuesday after the first Monday of November (Texas Election Code §41.001). San Antonio general elections for City Council and Mayor are held in May of odd-numbered years.
3. Runoff threshold
A candidate wins outright only by receiving more than 50 percent of votes cast. If no candidate clears this threshold in a multi-candidate race, the top 2 vote-getters advance to a runoff election held within 45 days of the final canvass, as specified by the City Charter.
4. Ballot measure placement
City Council passes an ordinance placing a proposition on the ballot. For charter amendments, the City Charter requires a Council vote before submission to voters. Bond propositions follow the same path and, if approved by voters, authorize debt issuance administered through the San Antonio Municipal Budget Process.
5. Canvassing and certification
After election day, the City Canvassing Board meets to certify results. Early voting and mail-in ballot processing are administered in coordination with the Bexar County Elections Department, which serves as the contract elections authority for the City.
Common scenarios
Candidate elections vs. ballot propositions — a key contrast
Candidate elections and ballot measure elections share procedural infrastructure but differ in outcome mechanics. Candidate elections produce an officeholder through a plurality-or-runoff system. Ballot propositions require only a simple majority of votes cast on that specific proposition to pass or fail — there is no runoff mechanism for a proposition.
Bond elections
Bond elections are among the most consequential ballot measures. A bond package groups capital improvement categories — streets, parks, public safety facilities, libraries — into one or more propositions. Voter approval authorizes the city to issue debt up to the stated amount. San Antonio's 2022 bond election placed 7 propositions totaling $1.2 billion before voters (City of San Antonio, Finance Department). Each proposition was voted on separately, allowing voters to approve or reject individual categories.
Charter amendment elections
The San Antonio Charter Overview page describes the charter's foundational role. Amending the charter requires voter approval. Council places proposed amendments on the ballot, and a simple majority of votes cast on the question determines passage.
Special elections
When a Council seat is vacated mid-term, the City Council calls a special election to fill it. Special elections follow the same Uniform Election Date rules but do not occur on a fixed cycle.
Decision boundaries
Determining which body controls a given electoral decision requires mapping the question against three distinct authority layers:
| Decision | Controlling authority |
|---|---|
| Calling a general or special election | San Antonio City Council by ordinance |
| Setting Uniform Election Dates | Texas Legislature via Election Code |
| Administering early voting logistics | Bexar County Elections Department (by contract) |
| Certifying results | City Canvassing Board |
| Challenging results or candidate eligibility | Texas district courts under Election Code |
| Placing a charter amendment on ballot | City Council, subject to Charter requirements |
For broad context on how San Antonio government institutions interact with one another, the San Antonio Government in Local Context page situates these electoral mechanisms within the city's full governance structure. Questions about specific election cycles, filing deadlines, or proposition language can be directed through the San Antonio City Clerk's office, the primary administrative authority for official city election records. Additional civic resources are catalogued at the site index.
The Texas Secretary of State serves as the statewide authority on election law interpretation and voter registration (Texas Secretary of State), while the Bexar County Elections Department handles physical polling infrastructure, ballot printing, and voting system maintenance for elections conducted within county boundaries — including city elections administered under interlocal agreement.
References
- Texas Election Code — Texas Legislature Online
- Texas Secretary of State, Elections Division
- City of San Antonio, City Clerk's Office
- City of San Antonio, Finance Department — Bond Program
- Bexar County Elections Department
- Texas Election Code §141.040 — Candidate Filing