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/SD/BUFFALO

Buffalo ZIP code, South Dakota

The ZIP code for Buffalo, SD is 57720, and its area code is 605.

USPS city name
1 ZIP code
Population
278
Area code
605

Buffalo in numbers

About 278 people live in Buffalo, in 161 households. The median household income is $85,104 a year, 13% above the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $114,100 (56% below the South Dakota median), and median gross rent is $725 a month. The median age is 57.2; 15.8% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 10 minutes.

Population278Buffalo278
Households161Buffalo161
Median age57.2Buffalo57.2South Dakota38.0US 38.9
Median household income$85,104Buffalo$85,104South Dakota$75,081US $80,734
Median home value$114,100Buffalo$114,100South Dakota$257,400US $332,700
Median gross rent$725Buffalo$725South Dakota$946US $1,413
Bachelor's degree or higher15.8%Buffalo15.8%South Dakota31.9%US 35.7%
Mean commute10.3 minBuffalo10.3 minSouth Dakota17.8 minUS 26.4 min
Population density502 / sq miBuffalo502 / sq mi

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

ZIP codes addressed as Buffalo

ZIP codes with the USPS city name Buffalo
ZIP City Type Population Median income Median home
57720 Buffalo , SD Standard 518 $79,091 $157,000

Map of Buffalo ZIP codes

57720

The ZIP codes of Buffalo, SD, 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 Buffalo

The nearest larger towns are Bowman, ND (1,499 people, 42 mi), Scranton, ND (387 people, 43 mi) and Bison (406 people, 52 mi).

More nearby: every ZIP code in Harding County · South Dakota ZIP codes

Cite this page

zipcodes.pro. “Buffalo, SD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/sd/buffalo

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