Boundary Atlas

ZIP code 73533: Duncan, OK

ZIP code 73533 is in Duncan (81% of residents), Empire City (1.9%) and Central High (1.1%), in Stephens County, Oklahoma. 16% of its residents live outside city limits. It is in Oklahoma's 4th congressional district. Its state senate districts are State Senate District 43 (53%) and State Senate District 31 (47%); its state house districts are State House District 50 (95%) and State House District 51 (4.6%).

27,396residents (2020 Census)
329.5 sq miland area
4cities and towns
1congressional district
25voting precincts

See it on the mapAll of Oklahoma

City and county

City or townShare of ZIP residents
Duncan81%
Empire City1.9%
Central High1.1%
Bray0.2%

CountyShare of ZIP residents
Stephens County100%

Town or county subdivisionShare of ZIP residents
Duncan CCD96%
Velma-Alma CCD3.3%
Marlow CCD0.4%
Comanche CCD0.3%

Congressional district

Congressional districtShare of ZIP residents
Oklahoma's 4th congressional district (OK-04)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (OK-04)Tom Cole (R)202-225-6165100%
U.S. SenatorAlan Armstrong (R)202-224-4721statewide
U.S. SenatorJames Lankford (R)202-224-5754 · contact formstatewide
State Senator (State Senate District 43)Kendal Sacchieri (R)53%
State Senator (State Senate District 31)Spencer Kern (R)47%
State Representative (State House District 50)Stacy Adams (R)95%
State Representative (State House District 51)Brad Boles (R)4.6%

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 4353%
State Senate District 3147%

State house districtShare of ZIP residents
State House District 5095%
State House District 514.6%

Voting precincts

25 voting precincts overlap ZIP 73533. Map them, with each precinct's share of the ZIP's residents.

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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:73533")

ZIP 73533 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.