Boundary Atlas

ZIP code 87544: Los Alamos, NM

ZIP code 87544 is in Los Alamos (97% of residents), in Los Alamos County (100%) and Sandoval County (<0.1%), New Mexico. It is in New Mexico's 3rd congressional district. Its state senate districts are State Senate District 5 (100%), State Senate District 6 (0.3%) and State Senate District 22 (<0.1%); its state house district is State House District 43.

13,548residents (2020 Census)
133.0 sq miland area
1cities and towns
1congressional district
18voting precincts

See it on the mapAll of New Mexico

City and county

City or townShare of ZIP residents
Los Alamos97%

CountyShare of ZIP residents
Los Alamos County100%
Sandoval County<0.1%

Town or county subdivisionShare of ZIP residents
Los Alamos CCD100%
White Rock CCD0.1%
Santo Domingo-San Felipe CCD<0.1%

Congressional district

Congressional districtShare of ZIP residents
New Mexico's 3rd congressional district (NM-03)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (NM-03)Teresa Leger Fernandez (D)202-225-6190100%
U.S. SenatorBen Ray Luján (D)202-224-6621 · contact formstatewide
U.S. SenatorMartin Heinrich (D)202-224-5521 · contact formstatewide
State Senator (State Senate District 5)Leo Jaramillo (Democratic)100%
State Senator (State Senate District 6)Bobby Gonzales (Democratic)0.3%
State Senator (State Senate District 22)Benny Shendo (Democratic)<0.1%
State Representative (State House District 43)Chris Chandler (Democratic)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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 5100%
State Senate District 60.3%
State Senate District 22<0.1%

State house districtShare of ZIP residents
State House District 43100%

Voting precincts

18 voting precincts overlap ZIP 87544. 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:87544")

ZIP 87544 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.