Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/KS/OSWEGO

Oswego ZIP code, Kansas

The ZIP code for Oswego, KS is 67356, and its area code is 620.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
1,937
Area code
620
State
Kansas

Mail addressed to Oswego uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Oswego in numbers

About 1,937 people live in Oswego, in 706 households. The median household income is $53,750 a year, 28% below the Kansas median of $74,275 (US: $80,734). The median owner-occupied home is valued at $82,700 (62% below the Kansas median), and median gross rent is $819 a month. The median age is 36.2; 12.9% of adults 25 and over hold a bachelor's degree or higher (35.6% across Kansas); the average commute takes 21 minutes.

Population1,937Oswego1,937
Households706Oswego706
Median age36.2Oswego36.2Kansas37.4US 38.9
Median household income$53,750Oswego$53,750Kansas$74,275US $80,734
Median home value$82,700Oswego$82,700Kansas$217,200US $332,700
Median gross rent$819Oswego$819Kansas$1,060US $1,413
Bachelor's degree or higher12.9%Oswego12.9%Kansas35.6%US 35.7%
Mean commute21.0 minOswego21.0 minKansas19.7 minUS 26.4 min
Population density805 / sq miOswego805 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Oswego city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Oswego

ZIP codes with the USPS city name Oswego
ZIP City Type Population Median income Median home
67356 Oswego , KS Standard 2,728 $52,882 $91,200

Other ZIP codes overlapping Oswego

These ZIP codes cover part of Oswego but are addressed as somewhere else.

ZIP codes overlapping Oswego
ZIP City Type Population Median income Median home
66725 Columbus , KS Standard 4,991 $48,443 $105,000

Map of Oswego ZIP codes

67356

The ZIP codes of Oswego, KS, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Oswego

The nearest larger towns are Parsons (9,425 people, 14 mi), Columbus (2,881 people, 15 mi) and Commerce, OK (2,212 people, 21 mi).

Towns near Oswego
TownPopulationDistance
Parsons 9,425 14.2 mi
Columbus 2,881 14.8 mi
Baxter Springs 3,855 23.2 mi
Miami, OK 12,926 23.5 mi
Galena 2,754 27.0 mi
Girard 2,777 27.8 mi
Pittsburg 20,637 28.4 mi

More nearby: every ZIP code in Labette County · Kansas ZIP codes

Cite this page

zipcodes.pro. “Oswego, KS ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ks/oswego

Underlying data is public domain or openly licensed — sources, vintages and licences.