Every precinct in San Joaquin County and every contested race on the June 2, 2026 ballot, in one interactive map.
Choose a contest from the menu to see how each neighborhood voted. That includes Governor and the other statewide offices, Congress, State Assembly, Stockton City Council Districts 1, 3 and 5, Supervisor Districts 2 and 4, and Assessor-Recorder-County Clerk. Hover over any precinct for a quick look, and click it for a full profile. The profile shows party registration, turnout, estimated non-voting Democrats, and the result in every contest on the ballot. You can also search for your own address or precinct number.
A few things the map shows
About one in three registered voters cast a ballot in San Joaquin County: 139,127 of 410,058, or 33.9%.
Democratic candidates for Governor won 52.5% of the two-party vote countywide and 64.0% in Stockton. Statewide they won 63.4%.
Former Stockton Mayor Michael Tubbs led the Lieutenant Governor race in San Joaquin County, though he finished fourth statewide.
How to read it. This was a top-two primary, so many races had several candidates from the same party. For partisan offices, the map’s margin adds up all Democratic candidates against all Republican candidates.
The Candidates view shows who led each precinct. Nonpartisan races compare the two leading candidates. Use the buttons to switch to turnout, roll-off, or lead size. You can also group results by city, council district, Supervisor district, Assembly district, or Congressional district. Targeting tools rank precincts for get-out-the-vote work. Export CSV downloads the numbers.
June 2026 Primary Precinct Explorer
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Race by council district ⤓ CSV
About this map · sources & methodology
Data sources. State and federal contests and party registration: California Statewide Database, June 2026 primary files for San Joaquin County (Statement of Vote and registration by precinct, precinct boundaries). Stockton City Council, Supervisor and Assessor-Recorder: the county’s certified Statement of Votes Cast (June 2, 2026 Statewide Direct Primary, certified June 25, 2026), whose precinct figures add up exactly to its certified totals. Statewide comparison figures: California Secretary of State Statement of Vote. Council-district boundaries: City of Stockton open data. By city: incorporated city limits from county/city GIS; precincts are assigned with the Statewide Database precinct-to-city file, and precincts the county numbers as unincorporated (numbers beginning with 9) are counted as unincorporated San Joaquin County. By Assembly / Congressional district: the districts each precinct voted in, with the Congressional lines adopted by Prop 50; by Supervisor district: official boundaries, precincts assigned by location. A city or district drawn with a thin grey outline and no fill lies outside the selected contest. The Statewide Database withholds results for 18 precincts with fewer than 10 voters; they show as having no results in the state and federal contests.
Reading the map. This was a top-two primary. For partisan offices the margin adds up all Democratic candidates against all Republican candidates, which is the clearest read of partisan strength when several candidates of one party split the vote; where a party ran one candidate, that candidate is named. The Candidates view colors each precinct by whoever led there, and the hover card and detail panel list every candidate’s share of all votes in the contest. For nonpartisan contests (Superintendent of Public Instruction, Council, Supervisor, Assessor) the margin compares the two leaders. The percentages under each contest’s description are shares of all votes cast in it. Turnout is ballots cast divided by registered voters. Endorsements are not marked on this page.
Compare baselines. California — the statewide result for the same pair of candidates (for example, Democratic candidates won 63.4% of the two-party Governor vote statewide and 52.5% in San Joaquin County). San Joaquin County — the countywide total. Stockton overall — the Stockton total for the same contest. Democratic / Republican registration — the precinct’s share of two-party registration. Any other contest — its result in the same precincts; city and district totals use only the precincts inside the contest you are viewing, so every comparison is like-for-like. President 2024 and Prop 50 (Nov 2025) — earlier results carried onto the 2026 precinct lines; with a 2026 contest selected, they show where Democrats gained or slipped since then. The default baseline is President 2024.
Earlier elections. San Joaquin redrew most of its precincts after Prop 50, so a 2024 or 2025 precinct does not line up with a 2026 one. The two earlier contests on this map are estimates: each older precinct’s votes are split among the 2026 precincts it overlaps, weighted toward where registered voters live today. President comes from the official November 2024 precinct results and Prop 50 from the official November 2025 results (both California Statewide Database). Countywide totals match the certified counts to within a few votes. A single precinct can be off by a few points, more where lines moved a lot or many new homes were built.
Analysis views. Roll-off — ballots cast minus votes in the contest: the share of voters who skipped that race. Mobilization opportunity — registered Democrats who did not vote, estimated as Democratic registration × (1 − turnout); it flags where Democratic votes were left on the table. This is an estimate that assumes Democrats turn out at the precinct's overall rate.
Targeting tools. The Targeting tools button opens four planning views for the selected contest: a Margin × turnout scatter (every precinct plotted by margin and turnout, with the Democratic-lean / lower-turnout quadrant flagged as the mobilization zone); a Behind Governor ranking of the precincts where the contest’s Democratic side ran furthest below the combined Democratic share of the Governor vote; a Behind registration ranking of the precincts where the candidate’s two-way share fell furthest below the precinct’s Democratic share of Dem + Rep registration; and a GOTV targets ranking of the precincts with the most estimated non-voting Democrats. Precinct profiles: search a precinct number, or click any precinct in those lists, to open a full profile — party registration, turnout, estimated non-voting Democrats, and the result in every contest on the ballot.
