Plain

County ZIP codes · Oklahoma · FIPS 40137

Stephens County, OK ZIP Codes

Stephens County, Oklahoma has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 9 residential and 2 for PO boxes or a single organization. 7 of the residential ones lie mainly in Stephens County and 2 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $59,906 in 73533 (Duncan) to $70,143 in 73529 (Comanche) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Stephens County?

73055 · Marlow: $66k73425 · Countyline: $36k73434 · Foster: $63k73442 · Loco: $52k73481 · Ratliff City: $63k73491 · Velma: $84k73529 · Comanche: $70k73533 · Duncan: $60k73548 · Hastings: –735337305573529735487344273434734817349173055 · Marlow: $66k73425 · Countyline: $36k73434 · Foster: $63k73442 · Loco: $52k73481 · Ratliff City: $63k73491 · Velma: $84k73529 · Comanche: $70k73533 · Duncan: $60k73548 · Hastings: –735337305573529735487344273434734817349173055 · Marlow: $66k73425 · Countyline: $36k73434 · Foster: $63k73442 · Loco: $52k73481 · Ratliff City: $63k73491 · Velma: $84k73529 · Comanche: $70k73533 · Duncan: $60k73548 · Hastings: –73533730557352973548734427343473481
The residential ZIP codes of Stephens County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 9 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 9 residential ZIP codes in Stephens County

7 ZIP codes lie mainly in Stephens County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Stephens County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
73533 Duncan 27,618 84 $60k $145k 100%
73055 Marlow 10,064 39 $66k $165k 75%
73529 Comanche 4,898 20 $70k $114k 74%
73491 Velma 791 76 $84k $115k 100%
73434 Foster 574 6 $63k $255k 55%
73442 Loco 275 3 $52k $134k 83%
73425 Countyline 201 42 $36k – 53%

Partly in Stephens County

Residential ZIP codes mainly in another county that reach at least 1% into Stephens County, by their share here
In this county
73481 Ratliff City 842 11 $63k $104k 17%
73548 Hastings 428 7 – $98k 6%

Download the 11 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

7 ZIP codes of Stephens County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Stephens County and in the neighboring counties
ZIPIn StephensElsewhere
7305575%Grady County 24%; Comanche County 2%
7352974%Jefferson County 24%; Cotton County 2%
7348117%Carter County 74%; Garvin County 9%
7343455%Garvin County 45%
735486%Cotton County 53%; Jefferson County 41%
7344283%Jefferson County 17%
7342553%Carter County 47%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Stephens County without a residential area (GeoNames postal codes)
ZIPPostal name
73534Duncan
73536Duncan

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Stephens County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Stephens County's ZIP codes use 3 prefixes: 730, 734 and 735.

Three-digit prefixes of Stephens County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Stephens County's
PrefixSectional centerHereAll codes
730 Oklahoma City, OK (SCF 730) 1 89
734 Oklahoma City, OK (SCF 730) 5 35
735 Oklahoma City, OK (SCF 730) 5 55

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.