California's 48th congressional district (CA-48)
California's 48th congressional district (CA-48) covers parts or all of Riverside County and San Diego County, and 56 ZIP codes (13 wholly inside it). Its 2020 population was 758,048. This is the map in force for the November 3, 2026 election.
Who represents CA-48
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (CA-48) | Darrell Issa (R) | 202-225-5672 |
| 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-48 |
|---|---|
| Riverside County | 15% |
| San Diego County | 12% |
ZIP codes
Percentages mark ZIPs only partly in CA-48: the share of that ZIP's residents inside it.
- 91905 (25%)
- 91934 (4.5%)
- 91948 (14%)
- 91962 (1.5%)
- 92003 (4.5%)
- 92004 (100%)
- 92010 (<0.1%)
- 92024 (<0.1%)
- 92025 (70%)
- 92026 (81%)
- 92027 (71%)
- 92028 (16%)
- 92029 (14%)
- 92036 (18%)
- 92056 (46%)
- 92059
- 92060
- 92061 (98%)
- 92065 (0.1%)
- 92066
- 92069
- 92070 (68%)
- 92078 (100%)
- 92081 (97%)
- 92082 (42%)
- 92083
- 92084 (97%)
- 92086
- 92096
- 92210
- 92220 (<0.1%)
- 92234 (<0.1%)
- 92253 (<0.1%)
- 92258 (3.7%)
- 92260 (<0.1%)
- 92262 (96%)
- 92264
- 92276 (<0.1%)
- 92282 (0.2%)
- 92536 (82%)
- 92539 (63%)
- 92543
- 92544 (66%)
- 92545 (99%)
- 92548 (93%)
- 92549 (99%)
- 92561
- 92563 (29%)
- 92567 (3.0%)
- 92582 (<0.1%)
- 92584 (1.4%)
- 92585 (8.8%)
- 92590 (59%)
- 92591
- 92592
- 92596 (100%)
Towns
Borrego Springs CCD, Pauma Valley CCD, Palm Springs CCD, Idyllwild CCD, Hemet-San Jacinto CCD, Valley Center CCD, Murrieta CCD, Oceanside-Escondido CCD, Palomar-Julian CCD, Fallbrook CCD, Perris Valley CCD, Mountain Empire CCD, Cathedral City-Palm Desert CCD, San Diego CCD, Ramona CCD and Desert Hot Springs CCD.
Get this in your AI agent
Your agent can draw every precinct in CA-48, 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:0648", children_level="precinct", include_districts=True)