ZIP code 83435: Jefferson County, ID
ZIP code 83435 is in Jefferson County (93%) and Clark County (7.0%), Idaho, outside any city or Census-designated place. It is in Idaho's 2nd congressional district. Its state senate district is State Senate District 31; its state house district is State House District 31.
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Jefferson County | 93% |
| Clark County | 7.0% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Mud Lake-Hamer CCD | 93% |
| West Clark CCD | 7.0% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Idaho's 2nd congressional district (ID-02) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (ID-02) | Michael K. Simpson (R) | 202-225-5531 | 100% |
| U.S. Senator | James E. Risch (R) | 202-224-2752 · contact form | statewide |
| U.S. Senator | Mike Crapo (R) | 202-224-6142 · contact form | statewide |
| State Senator (State Senate District 31) | Van Burtenshaw (R) | 100% | |
| State Representative (State House District 31) | Jerald Raymond (R) | 208-317-8777 | 100% |
| State Representative (State House District 31) | Rod Furniss (R) | 208-589-1100 | 100% |
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
- Jefferson County website: http://www.co.jefferson.id.us
- Jefferson County laws: search for the Jefferson County, Idaho code of ordinances
- Clark County website: http://www.clark-co.id.gov/
- Clark County laws: search for the Clark County, Idaho code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 31 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 31 | 100% |
Voting precincts
3 voting precincts overlap ZIP 83435. 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:83435")
ZIP 83435 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.