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/CA/RIVERDALE

Riverdale ZIP code, California

The ZIP code for Riverdale, CA is 93656, and its area code is 559.

USPS city name
1 ZIP code
Population
3,653
Area code
559

Riverdale in numbers

About 3,653 people live in Riverdale, in 819 households. The median household income is $56,975 a year, 43% below the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $283,600 (61% below the California median), and median gross rent is $1,126 a month. The median age is 25.5; 4.8% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 23 minutes.

Population3,653Riverdale3,653
Households819Riverdale819
Median age25.5Riverdale25.5California37.9US 38.9
Median household income$56,975Riverdale$56,975California$99,122US $80,734
Median home value$283,600Riverdale$283,600California$734,700US $332,700
Median gross rent$1,126Riverdale$1,126California$2,036US $1,413
Bachelor's degree or higher4.8%Riverdale4.8%California37.1%US 35.7%
Mean commute23.3 minRiverdale23.3 minCalifornia28.7 minUS 26.4 min
Population density931 / sq miRiverdale931 / sq mi

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

ZIP codes addressed as Riverdale

ZIP codes with the USPS city name Riverdale
ZIP City Type Population Median income Median home
93656 Riverdale , CA Standard 7,172 $72,333 $294,600

Map of Riverdale ZIP codes

93656

The ZIP codes of Riverdale, CA, 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 Riverdale

The nearest larger towns are Lemoore (27,102 people, 10 mi), Lemoore Station (6,175 people, 12 mi) and Armona (3,890 people, 12 mi).

Towns near Riverdale
TownPopulationDistance
Lemoore 27,102 10.1 mi
Lemoore Station 6,175 11.7 mi
Armona 3,890 12.0 mi
Hanford 59,754 13.8 mi
Easton 2,722 15.9 mi
Selma 24,659 17.1 mi
Fowler 7,094 17.1 mi
Kingsburg 12,755 17.9 mi
Huron 6,519 20.1 mi
San Joaquin 3,708 21.6 mi
Parlier 14,507 21.8 mi
Sunnyside 4,639 22.8 mi
Kerman 16,815 23.1 mi
Mayfair 5,044 24.1 mi

More nearby: every ZIP code in Fresno County · California ZIP codes

Cite this page

zipcodes.pro. “Riverdale, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/riverdale

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