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/MO/COOL-VALLEY

Cool Valley ZIP codes, Missouri

No ZIP code is named for Cool Valley, MO; addresses there use a neighbouring town's name. The ZIP code covering it is 63121. Its area codes are 314 and 557.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
1,411
Area codes
314, 557

NANPA lists no telephone rate centre for Cool Valley itself, so these are the area codes of the nearest one, Saint Louis (0.0 miles). A town on an area-code boundary can differ from its neighbour.

Cool Valley in numbers

About 1,411 people live in Cool Valley, in 475 households. The median household income is $53,560 a year, 24% below the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $102,800 (55% below the Missouri median), and median gross rent is $992 a month. The median age is 27.3; 12.1% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 17 minutes.

Population1,411Cool Valley1,411
Households475Cool Valley475
Median age27.3Cool Valley27.3Missouri39.0US 38.9
Median household income$53,560Cool Valley$53,560Missouri$70,702US $80,734
Median home value$102,800Cool Valley$102,800Missouri$230,300US $332,700
Median gross rent$992Cool Valley$992Missouri$1,033US $1,413
Bachelor's degree or higher12.1%Cool Valley12.1%Missouri32.4%US 35.7%
Mean commute17.1 minCool Valley17.1 minMissouri23.5 minUS 26.4 min
Population density3,081 / sq miCool Valley3,081 / sq mi

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

ZIP codes covering Cool Valley

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

ZIP codes overlapping Cool Valley
ZIP City Type Population Median income Median home
63121 Saint Louis , MO Standard 25,008 $42,701 $95,600

Map of Cool Valley ZIP codes

The ZIP codes of Cool Valley, MO, 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 Cool Valley

The nearest larger towns are Normandy (4,239 people, 1.3 mi), Bel-Ridge (2,432 people, 1.5 mi) and Ferguson (18,213 people, 1.7 mi).

Towns near Cool Valley
TownPopulationDistance
Normandy 4,239 1.3 mi
Ferguson 18,213 1.7 mi
Northwoods 3,623 2.0 mi
Berkeley 8,123 2.2 mi
Jennings 12,918 2.2 mi
St. John 6,527 2.3 mi
Pine Lawn 2,716 2.6 mi
Dellwood 4,847 2.7 mi
Woodson Terrace 3,908 2.9 mi
Pagedale 2,531 3.1 mi
Breckenridge Hills 4,402 3.4 mi
Moline Acres 2,843 3.7 mi
Overland 15,695 3.9 mi
University City 34,685 4.3 mi

More nearby: every ZIP code in St. Louis County · Missouri ZIP codes

Cite this page

zipcodes.pro. “Cool Valley, MO ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mo/cool-valley

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