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zipcodes.pro — ZIP/78615

78615

ZIP 78615 is Coupland, Texas, mostly in Williamson County; area codes 737 and 512; Central time.

Type
Standard
Time zone
America/Chicago
County
Williamson +1 more
Population
1,637
Coordinates
30.4631, -97.3929
☼ Live from 78615 — Coupland, TX

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Where 78615 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 78615
  • 🔢 Type 78615 into a pocket calculator and turn it upside down: SIgBL — not quite a word, sorry.
  • ➕ As a number, 78,615 = 3 × 3 × 5 × 1747. Its digits add up to 27, a total 1,806 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001100010111
  • 🏠 Its numerical neighbours: 78614 (Cost, TX, 74 mi away) and 78616 (Dale, TX, 38 mi away).
  • 🔄 Backwards, 78615 becomes 51687, which is not a ZIP code at all.
  • 👥 42 other ZIP codes are made of exactly the same digits (15678, 15687, 16875, 17568, 17856, 17865, …). The farthest-flung twin is 18657 in Tunkhannock, PA, 1,415 miles away.
  • 🧭 Farther south than 92% of all ZIP codes, and farther west than 75%.
  • 🎯651 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78615 and you would come out at 30.46°S, 82.61°E — 1,456 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 07m of daylight. Shortest: 10h 10m.
  • 📏 At 54.5 square miles of land, 78615 is bigger than 62% of ZIP codes — room for about 41 Central Parks.
🌙 The sky over 78615 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,637This ZIP1,637
Households549This ZIP549
Housing units586This ZIP586
Median age33.2This ZIP33.2Texas35.6US 38.9
Median household income$80,938This ZIP$80,938Texas$78,476US $80,734
Median home value$441,200This ZIP$441,200Texas$283,800US $332,700
Bachelor's degree or higher27.9%This ZIP27.9%
Mean commute39.4 minThis ZIP39.4 min
Population density30.0 / sq miThis ZIP30.0 / sq mi

Business and tax activity

Business establishments25This ZIP25
Employees154This ZIP154
Annual payroll$11,892,000This ZIP$11,892,000
Tax returns filed890This ZIP890
Total adjusted gross income$63,232,000This ZIP$63,232,000

Land area

Land area54.51 sq miThis ZIP54.51 sq mi
Water area0.43 sq miThis ZIP0.43 sq mi

Counties 78615 spans

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

CountyShare of this ZIP
Williamson County 63.9%
Travis County 36.1%

Other place names in 78615

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

ZIP codes near 78615

ZIPCityDistance
76574 Taylor, TX 8.0 mi
78621 Elgin, TX 8.9 mi
76578 Thrall, TX 10.5 mi
78634 Hutto, TX 11.2 mi
78653 Manor, TX 11.5 mi
78660 Pflugerville, TX 12.1 mi
78763 Austin, TX 13.3 mi
78691 Pflugerville, TX 13.6 mi
78650 Mc Dade, TX 15.1 mi
78664 Round Rock, TX 15.4 mi

Find every ZIP code within 10 miles of 78615 →

Questions about this ZIP code

Where is ZIP code 78615?

78615 is in Coupland, Texas, in Williamson County, part of the Austin-Round Rock-San Marcos, TX metropolitan area. Its published point location is 30.4631, -97.3929.

What county is 78615 in?

78615 spans 2 counties: Williamson County and Travis County. Most of it falls in Williamson 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 78615?

Coupland uses area codes 737 and 512, from NANPA's telephone records.

What time zone is 78615 in?

78615 uses America/Chicago.

How many people live in 78615?

About 1,637 people live in ZIP code 78615, in 549 households, at 30.0 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 78615?

$80,938 a year, against $78,476 across Texas.

What ZIP codes are near 78615?

The closest are 76574 (8 mi), 78621 (8.9 mi), 76578 (10.5 mi), 78634 (11.2 mi) and 78653 (11.5 mi).

Is 78615 a PO Box ZIP code?

78615 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “78615 ZIP Code — Coupland, Texas (Williamson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78615

Machine-readable version of these facts:

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