ZIP code 83657: Gem County, ID
ZIP code 83657 is in Gem County (98%) and Valley County (2.1%), Idaho, outside any city or Census-designated place. It is in Idaho's 1st congressional district. Its state senate districts are State Senate District 14 (98%) and State Senate District 8 (2.1%); its state house districts are State House District 14 (98%) and State House District 8 (2.1%).
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Gem County | 98% |
| Valley County | 2.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Sweet CCD | 98% |
| Cascade CCD | 2.1% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Idaho's 1st congressional district (ID-01) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (ID-01) | Russ Fulcher (R) | 202-225-6611 | 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 14) | Scott Grow (R) | 98% | |
| State Senator (State Senate District 8) | Christy Zito (R) | 208-590-4633 | 2.1% |
| State Representative (State House District 14) | Josh Tanner (R) | 98% | |
| State Representative (State House District 14) | Ted Hill (R) | 208-332-1124 | 98% |
| State Representative (State House District 8) | Faye Thompson (R) | 208-634-6569 | 2.1% |
| State Representative (State House District 8) | Rob Beiswenger (R) | 2.1% |
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
- Gem County laws: search for the Gem County, Idaho code of ordinances
- Valley County website: http://www.co.valley.id.us/
- Valley County laws: search for the Valley County, Idaho code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 14 | 98% |
| State Senate District 8 | 2.1% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 14 | 98% |
| State House District 8 | 2.1% |
Voting precincts
4 voting precincts overlap ZIP 83657. 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:83657")
ZIP 83657 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.