California’s 12th Congressional District is represented by Lateefah Simon (D) in the U.S. House of Representatives. The district is one of California’s seats in the 435-member House of Representatives. Each congressional district represents roughly 760,000 people based on the 2020 Census, and district boundaries were most recently redrawn during the redistricting cycle following that census.
Congressional representatives serve two-year terms and face election every even-numbered year. The next election for this seat will take place on November 3, 2026.
Population
746,726
Median Household Income
$105,647
Partisan Lean
D+74
2024 presidential margin (Trump vs Harris). Source: The Downballot.
District boundary, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.
Lateefah Simon and California's 12th Congressional District
Lateefah Simon, a member of the Democratic Party, represents California's 12th Congressional District and has held the seat since January 3, 2025. The boundary map for the district is above and the ZIP codes it covers are listed further down this page.
Committee assignments: House Committee on Oversight and Government Reform and House Committee on Small Business.
The current term ends January 3, 2027. The seat is on the ballot on Tuesday, November 3, 2026. Washington office phone: 202-225-2661. Official site: simon.house.gov.
Current Representative
Rep. Lateefah Simon (D)
119th Congress • Democrat • Representing this district since January 3, 2025
Lateefah Simon currently represents California’s 12th Congressional District as a member of the Democratic Party in the United States House of Representatives. The representative’s district office helps constituents with federal casework, such as Social Security claims and veterans’ benefits.
2026 Election
The 2026 election cycle for this district is underway. Candidate filings are ongoing ahead of the November 3, 2026 general election.
Voters in this district can verify their registration and find polling locations through their state’s secretary of state website.
On the ballot Tuesday, November 3, 2026
This seat is on the ballot on Tuesday, November 3, 2026. All 435 seats in the U.S. House are, because House terms run 2 years. The winner takes office on January 3, 2027.
Lateefah Simon holds the seat now and appears in the Federal Election Commission list above, so the incumbent has filed to run again.
Polling places in California are open 7 a.m. to 8 p.m., local time. Confirm your registration and polling place on the official federal voter page for California: vote.gov.
What is on the ballot nationally on November 3, 2026
Contact Your Representative
Washington Office
1023 Longworth House Office Building
Washington, DC 20515
Phone: (202) 225-2661
Online
Committee Assignments
About This District
The district lies within Alameda County in California. Its largest cities are Oakland (about 441,000), Berkeley (about 124,000), San Leandro (about 91,000), and Alameda (about 78,000).
Frequently Asked Questions
Who represents California's 12th Congressional District?
Lateefah Simon (D) represents California's 12th Congressional District in the U.S. House of Representatives.
What political party is Lateefah Simon a member of?
Lateefah Simon is a member of the Democratic Party.
How can I contact Lateefah Simon?
You can reach Lateefah Simon by phone at 202-225-2661 or through their official website at https://simon.house.gov.
When does Lateefah Simon's current term end?
Lateefah Simon's current term in the U.S. House of Representatives ends on January 3, 2027.
Where is California's 12th Congressional District?
California's 12th Congressional District is located in the state of California and is one of the 435 voting congressional districts in the U.S. House of Representatives.
What district does Lateefah Simon represent?
Lateefah Simon has represented California's 12th Congressional District since January 3, 2025. The boundary map for the district is on this page.
Where can I see a map of Lateefah Simon's district?
The boundary map for California's 12th Congressional District is on this page. It is drawn from U.S. Census Bureau TIGERweb boundary files for the 119th Congress.
What committees is Lateefah Simon on?
Lateefah Simon sits on House Committee on Oversight and Government Reform and House Committee on Small Business. Committee assignments come from the Clerk of the House MemberData file.
Is Lateefah Simon still in Congress?
This site shows Lateefah Simon holding California's 12th Congressional District, checked against the Clerk of the House member list. All 435 House seats are on the ballot on November 3, 2026, so the answer can change with that election.
Explore More
View all of California’s congressional districts or use our ZIP code lookup to find your own district.
All California Districts → Find Your District →This page covers California 12th District, including its current U.S. House representative, district map, ZIP codes, and 2026 election details.
Learn more about congressional districts
- What is a congressional district?
- What does a U.S. Representative do?
- What is gerrymandering?
- How congressional redistricting works
- Mid-decade redistricting explained
- Find your congressional representative
Nearby Districts in California
ZIP Codes in California's 12th Congressional District
This congressional district contains 33 ZIP codes. The most common 10 are shown below; expand the full list to see every ZIP in the district.
13 of these ZIP codes also extend into another California district, so a ZIP code here does not always identify a single representative. Examples include 94130 (also in the 2nd and 11th), 94501 (also in the 2nd and 11th), 94577 (also in the 14th), 94578 (also in the 14th), 94579 (also in the 14th), 94580 (also in the 14th), 94602 (also in the 10th and 14th), 94611 (also in the 10th).
- 94130
- 94501
- 94502
- 94577
- 94578
- 94579
- 94580
- 94601
- 94602
- 94603
View all 33 ZIP codes in this district
- 94130
- 94501
- 94502
- 94577
- 94578
- 94579
- 94580
- 94601
- 94602
- 94603
- 94605
- 94606
- 94607
- 94608
- 94609
- 94610
- 94611
- 94612
- 94613
- 94618
- 94619
- 94621
- 94702
- 94703
- 94704
- 94705
- 94706
- 94707
- 94708
- 94709
- 94710
- 94720
- 94920
ZIP-to-district boundaries sourced from the U.S. Census Bureau's 2024-07-30 Block Equivalency File for the 119th Congress. ZCTAs (ZIP Code Tabulation Areas) approximate USPS delivery ZIPs.
U.S. Senators for this state: Adam B. Schiff (D), Alex Padilla (D)
Local surveillance camera contracts
Automated license plate reader contracts are approved locally, by city councils and county boards, not by Congress. These places in this district have a contract record documented from public sources:
Records compiled by Who Approved This, an independent public-records project. Approval dates, amounts, and end dates are cited to council agendas, minutes, and signed contracts.
Last updated September 3, 2026.
Data last checked September 7, 2026.
See how this district compares with another using Compare Districts.