San Mateo Council District 1: Lisa Diaz Nash Leads Taso Zografos 2,624 to 1,716

SAN MATEO, California — November 5, 2026. Voters in City Council District 1 gave incumbent Lisa Diaz Nash an early reported lead over challenger Taso Zografos in the November 3 general election. The source-stamped county count carried by ABC7 San Francisco at 2:06 a.m. November 4 records 2,624 votes for Diaz Nash (60.46%) and 1,716 for Zografos (39.54%), a 908-vote lead. Official certification is still pending.

Why district boundaries determine the ballot

San Mateo’s official 2026 election information confirms that residents elect council members by district. Districts 1, 3 and 5 voted for their council representative on November 3; residents of the city’s other districts did not vote for each of those specific seats. The 4,340 valid selections in District 1 are a part of the city’s overall municipal voting, not a citywide mayoral election result.

How District 1 compares with Districts 3 and 5

In District 3, Seema Patel had 2,060 votes and incumbent Robert Newsom Jr. had 1,250 in the same first report. In District 5, Dana Yates Sahae and incumbent council member Adam Loraine were separated by just five votes, with Dave Johnson third. These are three distinct council seats, so candidate support percentages and margins do not imply identical turnout or voter preferences across districts.

Separate questions for city voters

All eligible city voters also considered local ballot Measures F and H. Measure H concerns a proposed quarter-cent local sales tax, while Measure F concerns updates to the city charter, including the district-election structure. The measures have Yes/No totals and cannot be equated with votes for Diaz Nash or Zografos.

What the City Council does

Councilmembers take part in municipal budget approvals, land-use decisions, service funding, street infrastructure and public policy. The City of San Mateo selects its mayor through council procedures, which differ from a separately held citywide mayoral candidate election. A reported council election lead is not evidence that any one candidate can unilaterally implement future policy.

Follow the remaining canvass

County officials continue processing eligible mail and provisional ballots, reconciling records and carrying out post-election checks. An early percentage of reported precincts cannot be equated with a finished legal count. Readers can use the county election office for later updates, comparing actual source timestamps rather than mixing returns from different batches. All figures in this report are the November 4 source snapshot, checked November 5, and are not certified.

Sources: ABC7 San Francisco local election results; City of San Mateo official 2026 election and district boundary information; San Mateo County Elections.

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