Boundary Atlas

ZIP code 84124: Millcreek, UT

ZIP code 84124 is in Millcreek (51% of residents) and Holladay (49%), in Salt Lake County, Utah. It is in Utah's 1st congressional district. Its state senate districts are State Senate District 14 (88%) and State Senate District 13 (12%); its state house districts are State House District 33 (70%), State House District 34 (29%) and State House District 32 (0.9%).

22,872residents (2020 Census)
7.7 sq miland area
2cities and towns
1congressional district
27voting precincts

See it on the mapAll of Utah

City and county

City or townShare of ZIP residents
Millcreek51%
Holladay49%

CountyShare of ZIP residents
Salt Lake County100%

Town or county subdivisionShare of ZIP residents
Salt Lake City CCD78%
Emigration CCD22%

Congressional district

Congressional districtShare of ZIP residents
Utah's 1st congressional district (UT-01)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1488%
State Senate District 1312%
State Senate District 15land only

State house districtShare of ZIP residents
State House District 3370%
State House District 3429%
State House District 320.9%

Voting precincts

27 voting precincts overlap ZIP 84124. 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:84124")

ZIP 84124 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.