ZIP code 95640: Ione, CA
ZIP code 95640 is in Ione (40% of residents), Camanche North Shore (8.3%), Camanche Village (7.5%) and Buena Vista (4.2%), in Amador County (100%) and Sacramento County (<0.1%), California. 40% of its residents live outside city limits. It is in California's 5th congressional district (100%) and California's 7th congressional district (<0.1%). Its state senate districts are State Senate District 4 (100%) and State Senate District 6 (<0.1%); its state house districts are Assembly District 9 (96%) and Assembly District 1 (4.3%).
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Ione | 40% |
| Camanche North Shore | 8.3% |
| Camanche Village | 7.5% |
| Buena Vista | 4.2% |
| County | Share of ZIP residents |
|---|---|
| Amador County | 100% |
| Sacramento County | <0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Ione CCD | 94% |
| Jackson CCD | 5.3% |
| Sutter Creek-Plymouth CCD | 0.5% |
| Sloughhouse CCD | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| California's 5th congressional district (CA-05) | 100% |
| California's 7th congressional district (CA-07) | <0.1% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 4 | 100% |
| State Senate District 6 | <0.1% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 9 | 96% |
| Assembly District 1 | 4.3% |
Voting precincts
15 voting precincts overlap ZIP 95640. 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:95640")
ZIP 95640 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.