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zipcodes.pro — ZIP/37031

37031

ZIP 37031 is Castalian Springs, Tennessee, mostly in Sumner County; area codes 615 and 629; Central time.

Type
Standard
Time zone
America/Chicago
County
Sumner +1 more
Population
3,926
Coordinates
36.3775, -86.3012
☼ Live from 37031 — Castalian Springs, TN

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Local time: —

Where 37031 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 37031
  • 🔢 Type 37031 into a pocket calculator and turn it upside down: IEOLE — not quite a word, sorry.
  • ➕ As a number, 37,031 = 19 × 1949. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001000010100111
  • 🏠 Its numerical neighbours: 37030 (Carthage, TN, 21 mi away) and 37032 (Cedar Hill, TN, 41 mi away).
  • 🔄 Backwards, 37031 becomes 13073 — and that is a real ZIP code: Groton, NY, 680 miles away.
  • 👥 33 other ZIP codes are made of exactly the same digits (01337, 01373, 13037, 13073, 13730, 17033, …). The farthest-flung twin is 01337 in Bernardston, MA, 850 miles away.
  • 🧭 Farther south than 67% of all ZIP codes, and farther east than 53%.
  • 🎯708 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 37031 and you would come out at 36.38°S, 93.70°E — 1,300 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 39m of daylight. Shortest: 9h 40m.
  • 📏 At 38.3 square miles of land, 37031 is bigger than 52% of ZIP codes — room for about 29 Central Parks.
🌙 The sky over 37031 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population3,926This ZIP3,926
Households1,707This ZIP1,707
Housing units1,804This ZIP1,804
Median age53.5This ZIP53.5Tennessee38.9US 38.9
Median household income$98,114This ZIP$98,114Tennessee$69,595US $80,734
Median home value$352,600This ZIP$352,600Tennessee$286,700US $332,700
Bachelor's degree or higher21.2%This ZIP21.2%
Mean commute29.1 minThis ZIP29.1 min
Population density102.6 / sq miThis ZIP102.6 / sq mi

Business and tax activity

Business establishments38This ZIP38
Employees187This ZIP187
Annual payroll$7,156,000This ZIP$7,156,000
Tax returns filed2,160This ZIP2,160
Total adjusted gross income$164,224,000This ZIP$164,224,000

Land area

Land area38.25 sq miThis ZIP38.25 sq mi
Water area1.76 sq miThis ZIP1.76 sq mi

Counties 37031 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Sumner County 78.2%
Trousdale County 21.8%

Other place names in 37031

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

ZIP codes near 37031

ZIPCityDistance
37087 Lebanon, TN 8.0 mi
37066 Gallatin, TN 8.7 mi
37074 Hartsville, TN 8.9 mi
37022 Bethpage, TN 9.5 mi
37088 Lebanon, TN 11.7 mi
37151 Riddleton, TN 15.1 mi
37071 Gladeville, TN 15.3 mi
37136 Norene, TN 15.3 mi
37057 Dixon Springs, TN 15.3 mi
37186 Westmoreland, TN 15.8 mi

Find every ZIP code within 10 miles of 37031 →

Questions about this ZIP code

Where is ZIP code 37031?

37031 is in Castalian Springs, Tennessee, in Sumner County, part of the Nashville-Davidson--Murfreesboro--Franklin, TN metropolitan area. Its published point location is 36.3775, -86.3012.

What county is 37031 in?

37031 spans 2 counties: Sumner County and Trousdale County. Most of it falls in Sumner County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 37031?

Castalian Springs uses area codes 615 and 629, from NANPA's telephone records.

What time zone is 37031 in?

37031 uses America/Chicago.

How many people live in 37031?

About 3,926 people live in ZIP code 37031, in 1,707 households, at 102.6 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 37031?

$98,114 a year, against $69,595 across Tennessee.

What ZIP codes are near 37031?

The closest are 37087 (8 mi), 37066 (8.7 mi), 37074 (8.9 mi), 37022 (9.5 mi) and 37088 (11.7 mi).

Is 37031 a PO Box ZIP code?

37031 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “37031 ZIP Code — Castalian Springs, Tennessee (Sumner County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/37031

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