California's 33rd congressional district (CA-33)
California's 33rd congressional district (CA-33) covers parts or all of San Bernardino County and Riverside County, and 27 ZIP codes (8 wholly inside it). Its 2020 population was 757,177. This is the map in force for the November 3, 2026 election.
Who represents CA-33
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (CA-33) | Pete Aguilar (D) | 202-225-3201 |
| U.S. Senator | Adam B. Schiff (D) | 202-224-3841 |
| U.S. Senator | Alex Padilla (D) | 202-224-3553 · contact form |
Elected in 2024 under CA's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in CA-33 |
|---|---|
| San Bernardino County | 34% |
| Riverside County | 0.4% |
ZIP codes
Percentages mark ZIPs only partly in CA-33: the share of that ZIP's residents inside it.
- 91701 (30%)
- 91730 (46%)
- 91737 (27%)
- 91739 (99%)
- 92313
- 92316 (24%)
- 92324 (99%)
- 92335 (4.8%)
- 92336 (98%)
- 92346 (91%)
- 92359 (0.2%)
- 92373 (64%)
- 92374 (92%)
- 92376
- 92377
- 92401
- 92404 (96%)
- 92405
- 92407 (96%)
- 92408 (97%)
- 92410
- 92411
- 92415
- 92501 (4.7%)
- 92507 (13%)
- 92509 (<0.1%)
- 92557 (0.8%)
Towns
San Bernardino CCD, Ontario CCD, Riverside CCD, Big Bear CCD and Lake Arrowhead CCD.
Get this in your AI agent
Your agent can draw every precinct in CA-33, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:0633", children_level="precinct", include_districts=True)