2025 Special Election Precinct Map
Proposition 50 — the November 2025 measure on California's congressional maps — passed statewide with 64% Yes. Closer to home, San Joaquin County voted 54% Yes to 46% No, and the City of Stockton backed it more strongly at 65%. Stockton Democrats Together has built an interactive map that lets you see how the county voted precinct by precinct.
Switch between views to see Yes/No margins block by block, where turnout was highest and lowest, and how far participation fell off from the November 2024 general election — a roughly 24-point drop-off countywide that’s now visible precinct by precinct. You can also compare each precinct’s Yes share to how Kamala Harris performed there in 2024, and break the results down by Stockton city council district.
The map draws on the certified Statement of Vote from the San Joaquin County Registrar of Voters, with statewide totals from the California Secretary of State. Hover over any precinct for a full breakdown, or use the compare tool to measure the Yes vote against the county, the state, or the 2024 presidential result. Take a look below.
Prop 50 Precinct Explorer
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Race by council district ⤓ CSV
About this map · sources & methodology
Data sources. Results: certified San Joaquin County Statement of Vote (Nov 5, 2024 general). Precinct geography & party registration: California Statewide Database (srprec_077_g24, g24 snapshot). Council-district boundaries: City of Stockton open data. Statewide registration baseline: California Secretary of State 15-day County Report of Registration. By city: incorporated city-limit boundaries from county/city GIS (reprojected to WGS84); precincts are assigned to cities using the Statewide Database registrant-based srprec-to-place crosswalk (more complete than centroid assignment for consolidated/mail precincts). Everything outside the eight incorporated city limits is counted as unincorporated San Joaquin County. By Assembly / Supervisor district: official district boundaries (Assembly 2021 final maps; County supervisorial districts) reprojected to WGS84; precincts are assigned by centroid, then pinned exactly to the AD-13, Supervisor District 1, and District 3 precincts that cast ballots in those contests. A city or district shown with a dashed outline and no fill lies outside the selected contest; "X of Y precincts" marks a region only partly inside it.
Reading the map. Margins and vote shares are two-party (two-option for measures) and exclude minor candidates and write-ins. Turnout is ballots cast divided by registered voters. (D) marks the SJDCC-endorsed choice.
Compare baselines. California — the statewide figure for the same contest (its own statewide vote share for President, U.S. Senate, and the propositions; Democratic registration for the registration layer). For the legislative and congressional district races, which have no statewide equivalent, it is the statewide top-of-ticket Democratic two-party share (Harris, 60.4%) as a PVI reference. San Joaquin County / this contest overall — the countywide total. Stockton overall — the citywide Stockton total for the same measure (a candidate’s vote share for a race; Democratic registration for the registration layer). Democratic / Republican registration — the precinct's share of two-party registration.
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 three planning views for the selected contest: a performance × turnout scatter (every precinct plotted by two-party margin and turnout, with the Democratic-lean / lower-turnout quadrant flagged as the mobilization zone); a GOTV targets ranking of the precincts with the most estimated non-voting Democrats; and a Behind Harris ranking of the precincts where the contest’s candidate ran furthest below the presidential top of the ticket. 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.
