California’s 45th Congressional District is represented by Derek Tran (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
750,565
Median Household Income
$105,268
Partisan Lean
D+2
2024 presidential margin (Trump vs Harris). Source: The Downballot.
District boundary, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.
Derek Tran and California's 45th Congressional District
Derek Tran, a member of the Democratic Party, represents California's 45th 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 Armed Services 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: 202-225-2415. Official site: tran.house.gov.
Current Representative
Rep. Derek Tran (D)
119th Congress • Democrat • Representing this district since January 3, 2025
Derek Tran currently represents California’s 45th 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 Federal Election Commission has 7 candidate filings on record for the 2026 race in this district as of September 16, 2026. A filing stays on record after a candidate withdraws or loses a primary, so some names below will not be on the November 3, 2026 ballot.
- Derek Tran (Democratic, incumbent)
- Thomas Ky-Phong Vo (Republican)
- Mark Andrew Leonard (Republican)
- Chi Charlie Nguyen (Republican)
- Amy Phan West (Republican)
- Michelle Steel (Republican)
- Chuong Vo (Republican)
Source: Federal Election Commission filings, refreshed automatically. The FEC lists everyone who has filed to run; it does not show who won a primary. Voters can confirm registration and polling places 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.
Derek Tran 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
1127 Longworth House Office Building
Washington, DC 20515
Phone: (202) 225-2415
Online
Committee Assignments
About This District
The district covers parts of Orange and Los Angeles counties in California. Its largest cities are Garden Grove (about 172,000), Fullerton (about 144,000), Westminster (about 91,000), and Buena Park (about 84,000).
Frequently Asked Questions
Who represents California's 45th Congressional District?
Derek Tran (D) represents California's 45th Congressional District in the U.S. House of Representatives.
What political party is Derek Tran a member of?
Derek Tran is a member of the Democratic Party.
How can I contact Derek Tran?
You can reach Derek Tran by phone at 202-225-2415 or through their official website at https://tran.house.gov.
When does Derek Tran's current term end?
Derek Tran's current term in the U.S. House of Representatives ends on January 3, 2027.
Where is California's 45th Congressional District?
California's 45th 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 Derek Tran represent?
Derek Tran has represented California's 45th Congressional District since January 3, 2025. The boundary map for the district is on this page.
Where can I see a map of Derek Tran's district?
The boundary map for California's 45th Congressional District is on this page. It is drawn from U.S. Census Bureau TIGERweb boundary files for the 119th Congress.
What committees is Derek Tran on?
Derek Tran sits on House Committee on Armed Services and House Committee on Small Business. Committee assignments come from the Clerk of the House MemberData file.
Is Derek Tran still in Congress?
This site shows Derek Tran holding California's 45th 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 45th 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 45th Congressional District
This congressional district contains 44 ZIP codes. The most common 10 are shown below; expand the full list to see every ZIP in the district.
40 of these ZIP codes also extend into another California district, so a ZIP code here does not always identify a single representative. Examples include 90620 (also in the 46th), 90621 (also in the 46th), 90630 (also in the 42nd and 46th and 47th), 90631 (also in the 38th), 90638 (also in the 38th and 46th), 90650 (also in the 38th and 42nd), 90680 (also in the 46th), 90703 (also in the 38th and 42nd).
- 90620
- 90621
- 90623
- 90630
- 90631
- 90638
- 90650
- 90680
- 90701
- 90703
View all 44 ZIP codes in this district
- 90620
- 90621
- 90623
- 90630
- 90631
- 90638
- 90650
- 90680
- 90701
- 90703
- 90713
- 90715
- 90716
- 90720
- 90740
- 90808
- 92647
- 92649
- 92655
- 92683
- 92703
- 92704
- 92706
- 92708
- 92801
- 92802
- 92804
- 92805
- 92806
- 92807
- 92821
- 92823
- 92831
- 92832
- 92833
- 92835
- 92840
- 92841
- 92843
- 92844
- 92845
- 92868
- 92870
- 92886
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)
Last updated September 3, 2026.
Data last checked September 7, 2026.
See how this district compares with another using Compare Districts.