ZIP code 95658: Newcastle, CA
ZIP code 95658 is in Newcastle (20% of residents), in Placer County, California. 80% of its residents live outside city limits. It is in California's 3rd congressional district. Its state senate districts are State Senate District 6 (96%) and State Senate District 1 (4.0%); its state house districts are Assembly District 5 (85%) and Assembly District 3 (15%).
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Newcastle | 20% |
| County | Share of ZIP residents |
|---|---|
| Placer County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Auburn CCD | 67% |
| Rocklin CCD | 19% |
| Lincoln CCD | 15% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| California's 3rd congressional district (CA-03) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-03) | Kevin Kiley (I) | 202-225-2523 | 100% |
| U.S. Senator | Adam B. Schiff (D) | 202-224-3841 | statewide |
| U.S. Senator | Alex Padilla (D) | 202-224-3553 · contact form | statewide |
| State Senator (State Senate District 6) | Roger Niello (R) | 916-464-3980 | 96% |
| State Senator (State Senate District 1) | Megan Dahle (R) | 530-879-7424 | 4.0% |
| Assembly Member (Assembly District 5) | Joe Patterson (R) | 916-435-0501 | 85% |
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: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Newcastle laws: search for the Newcastle, California code of ordinances
- Placer County website: http://www.placer.ca.gov/
- Placer County laws: search for the Placer County, California code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 6 | 96% |
| State Senate District 1 | 4.0% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 5 | 85% |
| Assembly District 3 | 15% |
Voting precincts
28 voting precincts overlap ZIP 95658. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:95658")
ZIP 95658 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.