ZIP code 59623: Lewis and Clark County, MT
ZIP code 59623 is in Lewis and Clark County, Montana, outside any city or Census-designated place. It is in Montana's 2nd congressional district. Its state senate district is State Senate District 41; its state house district is State House District 81.
See it on the mapAll of Montana
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Lewis and Clark County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Helena CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Montana's 2nd congressional district (MT-02) | 100% |
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 41 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 81 | 100% |
Voting precincts
1 voting precinct overlap ZIP 59623. 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:59623")
ZIP 59623 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.