ZIP code 91020: La Crescenta-Montrose, CA
ZIP code 91020 is in La Crescenta-Montrose (72% of residents) and Glendale (28%), in Los Angeles County, California. It is in California's 28th congressional district (72%) and California's 30th congressional district (28%). Its state senate district is State Senate District 25; its state house districts are Assembly District 44 (99%) and Assembly District 41 (0.6%).
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| La Crescenta-Montrose | 72% |
| Glendale | 28% |
| La Cañada Flintridge | 0.6% |
| County | Share of ZIP residents |
|---|---|
| Los Angeles County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Pasadena CCD | 72% |
| San Fernando Valley CCD | 28% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| California's 28th congressional district (CA-28) | 72% |
| California's 30th congressional district (CA-30) | 28% |
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 25 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 44 | 99% |
| Assembly District 41 | 0.6% |
Voting precincts
10 voting precincts overlap ZIP 91020. 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:91020")
ZIP 91020 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.