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zipcodes.pro — ZIP/63021

63021

ZIP 63021 is in Ballwin, Missouri, in St. Louis County; area code 636; Central time. Ballwin has 4 ZIP codes; the others are 63011, 63022 and 63024.

Type
Standard
Time zone
America/Chicago
County
St. Louis
Metro area
St. Louis, MO-IL
Population
55,666
Coordinates
38.5698, -90.5457
☼ Live from 63021 — Ballwin, MO

Weather right now

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Local time: —

Where 63021 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 63021
  • 🔢 Type 63021 into a pocket calculator and turn it upside down: IZOEg — not quite a word, sorry.
  • ➕ As a number, 63,021 = 3 × 7 × 3001. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1111011000101101
  • 🏠 Its numerical neighbours: 63020 (De Soto, MO, 32 mi away) and 63022 (Ballwin, MO, 2 mi away).
  • 🔄 Backwards, 63021 becomes 12036 — and that is a real ZIP code: Charlotteville, NY, 875 miles away.
  • 👥 62 other ZIP codes are made of exactly the same digits (01236, 01263, 02136, 02163, 02361, 02631, …). The farthest-flung twin is 02631 in Brewster, MA, 1,101 miles away.
  • 🧭 Farther south than 54% of all ZIP codes, and farther west than 58%.
  • 🎯439 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 63021 and you would come out at 38.57°S, 89.45°E — 1,206 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 52m of daylight. Shortest: 9h 28m.
  • 📏 At 21.8 square miles of land, 63021 is bigger than 39% of ZIP codes — room for about 17 Central Parks.
🌙 The sky over 63021 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population55,666This ZIP55,666
Households22,131This ZIP22,131
Housing units22,942This ZIP22,942
Median age40.7This ZIP40.7Missouri39.0US 38.9
Median household income$120,177This ZIP$120,177Missouri$70,702US $80,734
Median home value$349,500This ZIP$349,500Missouri$230,300US $332,700
Median gross rent$1,423This ZIP$1,423Missouri$1,033US $1,413
Bachelor's degree or higher63.0%This ZIP63.0%
Mean commute23.9 minThis ZIP23.9 min
Population density2,550.8 / sq miThis ZIP2,550.8 / sq mi

Business and tax activity

Business establishments725This ZIP725
Employees6,403This ZIP6,403
Annual payroll$334,131,000This ZIP$334,131,000
Tax returns filed28,140This ZIP28,140
Total adjusted gross income$3,062,947,000This ZIP$3,062,947,000

Land area

Land area21.82 sq miThis ZIP21.82 sq mi
Water area0.16 sq miThis ZIP0.16 sq mi

Other place names in 63021

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 63021

ZIPCityDistance
63022 Ballwin, MO 1.7 mi
63024 Ballwin, MO 1.7 mi
63011 Ballwin, MO 2.5 mi
63088 Valley Park, MO 2.8 mi
63040 Grover, MO 4.8 mi
63017 Chesterfield, MO 6.0 mi
63049 High Ridge, MO 6.4 mi
63131 Saint Louis, MO 6.6 mi
63026 Fenton, MO 6.6 mi
63038 Glencoe, MO 6.6 mi

Find every ZIP code within 10 miles of 63021 →

Questions about this ZIP code

Where is ZIP code 63021?

63021 is in Ballwin, Missouri, in St. Louis County, part of the St. Louis, MO-IL metropolitan area. Its published point location is 38.5698, -90.5457.

What county is 63021 in?

63021 lies in St. Louis County.

What area code is 63021?

Ballwin uses area code 636, from NANPA's telephone records.

What time zone is 63021 in?

63021 uses America/Chicago.

How many people live in 63021?

About 55,666 people live in ZIP code 63021, in 22,131 households, at 2,550.8 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 63021?

$120,177 a year, against $70,702 across Missouri.

What ZIP codes are near 63021?

The closest are 63022 (1.7 mi), 63024 (1.7 mi), 63011 (2.5 mi), 63088 (2.8 mi) and 63040 (4.8 mi).

Is 63021 a PO Box ZIP code?

63021 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “63021 ZIP Code — Ballwin, Missouri (St. Louis County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/63021

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