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US ZIP Code Profile

ZIP Code 78615
Coupland, Texas

ZIP code 78615 is in Coupland, located in Williamson County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 1,694. The estimated median adjusted gross income per tax return is $47,024, and about 4% of filers report $200,000 or more.

2020 Population
1,694
Census ZCTA
County
Williamson
FIPS 48491
Median income (est.)
$47,024
IRS SOI 2022
Land Area
52.402 mi²
+ 0.463 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityCoupland, TX
CountyWilliamson County (FIPS 48491)
StateTexas (FIPS 48)
Metro Area (MSA)Austin-Round Rock, TX Metro Area (12420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.46546, -97.38411
Land / Water Area52.402 mi² land · 0.463 mi² water

02Income & Economics

Distribution of the 890 individual tax returns filed in 78615 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
29.2%
$25K–$50K
23.6%
$50K–$75K
15.7%
$75K–$100K
11.2%
$100K–$200K
15.7%
$200K+
4.5%
The $200,000+ bracket accounts for 26% of 78615's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($47,024) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 78615's IRS income metrics, 2020–2022.

Median income (2021→2022)
$47,024
▲ 5.5%
Filers earning $200K+
4.5%
▼ 1.3 pt
Total filers
890
▲ 3.5%
GET /zipc/v2/zipcodes/78615/soi?year=… $41K 2020 $45K 2021 $47K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 78615 ZCTA.

2000
1,131
 
2010
1,290
▲ +14.1%
2020
1,694
▲ +31.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number482080
City AliasesBeyersville, Coupland

06Frequently Asked Questions

What county is ZIP code 78615 in?

ZIP code 78615 is in Williamson County, Texas (county FIPS code 48491).

What city is ZIP code 78615?

The primary USPS city for 78615 is Coupland, TX.

What metro area (MSA) is 78615 in?

78615 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78615?

The 2020 Census population of 78615 was 1,694 residents.

What is the median income in ZIP code 78615?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78615 is about $47,024, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.