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US ZIP Code Profile

ZIP Code 78017
Dilley, Texas

ZIP code 78017 is in Dilley, located in Frio County, Texas. Its 2020 Census population was 5,912. The estimated median adjusted gross income per tax return is $34,783, and about 3% of filers report $200,000 or more.

2020 Population
5,912
Census ZCTA
County
Frio
FIPS 48163
Median income (est.)
$34,783
IRS SOI 2022
Land Area
372.464 mi²
+ 0.278 mi² water

01Location & Geography

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

Primary CityDilley, TX
CountyFrio County (FIPS 48163)
StateTexas (FIPS 48)
Census Region / DivisionSouth Region · West South Central Division
Coordinates28.711946, -99.17742
Land / Water Area372.464 mi² land · 0.278 mi² water

02Income & Economics

Distribution of the 1,600 individual tax returns filed in 78017 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
38.8%
$25K–$50K
28.7%
$50K–$75K
13.8%
$75K–$100K
8.1%
$100K–$200K
7.5%
$200K+
3.1%
The $200,000+ bracket accounts for 32% of 78017's total adjusted gross income, from 3% of returns — a concentration that drives the gap between the median ($34,783) 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 78017's IRS income metrics, 2020–2022.

Median income (2021→2022)
$34,783
▲ 11.3%
Filers earning $200K+
3.1%
▲ 0.6 pt
Total filers
1,600
▲ 1.3%
GET /zipc/v2/zipcodes/78017/soi?year=… $31K 2020 $31K 2021 $35K 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 78017 ZCTA.

2000
5,347
 
2010
4,787
▼ -10.5%
2020
5,912
▲ +23.5%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number482495
City AliasesDerby, Dilley, Divot

06Frequently Asked Questions

What county is ZIP code 78017 in?

ZIP code 78017 is in Frio County, Texas (county FIPS code 48163).

What city is ZIP code 78017?

The primary USPS city for 78017 is Dilley, TX.

What is the population of ZIP code 78017?

The 2020 Census population of 78017 was 5,912 residents.

What is the median income in ZIP code 78017?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78017 is about $34,783, with around 3% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.