County ZIP codes · Oklahoma · FIPS 40147

Washington County, OK ZIP Codes

Washington County, Oklahoma has 13 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 11 residential and 2 for PO boxes or a single organization. 6 of the residential ones lie mainly in Washington County and 5 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $47,168 in 74003 (Bartlesville) to $92,091 in 74021 (Collinsville) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

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

How different are its ZIP codes?

74003 · $47k 74021 · $92k

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $57,821 and $71,796.

They carry 10 postal town names.

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

All 11 residential ZIP codes in Washington County

6 ZIP codes lie mainly in Washington County; 5 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Washington County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
74006	Bartlesville	27,911	305	$72k	$200k	100%
74029	Dewey	5,331	117	$58k	$151k	100%
74061	Ramona	2,245	25	$59k	$226k	100%
74051	Ochelata	1,888	57	$68k	$178k	90%
74022	Copan	1,793	15	$47k	$115k	55%
74082	Vera	137	753	$51k	$101k	100%

Partly in Washington County

Residential ZIP codes mainly in another county that reach at least 1% into Washington County, by their share here
						In this county
74083	Wann	791	7	$66k	$234k	30%
74003	Bartlesville	14,024	108	$47k	$114k	15%
74021	Collinsville	23,628	353	$92k	$245k	15%
74080	Talala	3,003	30	$91k	$288k	13%
74070	Skiatook	15,447	79	$68k	$225k	9%

Download the 13 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 Washington County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Washington County and in the neighboring counties
ZIP	In Washington	Elsewhere
74021	15%	Tulsa County 66%; Rogers County 19%
74070	9%	Osage County 74%; Tulsa County 17%
74003	15%	Osage County 85%
74080	13%	Rogers County 87%
74051	90%	Osage County 10%
74022	55%	Osage County 45%
74083	30%	Nowata County 70%

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

PO Box and single-organization ZIP codes

ZIP codes in Washington County without a residential area (GeoNames postal codes)
ZIP	Postal name
74004	Bartlesville
74005	Bartlesville

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Washington County starts with 740.

Three-digit prefixes of Washington 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 Washington County's
Prefix	Sectional center	Here	All codes
740	Tulsa, OK (SCF 740)	13	75

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

Where are the ZIP codes of Washington County?