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US ZIP Code Profile

ZIP Code 78879
Rio Frio, Texas

ZIP code 78879 is in Rio Frio, located in Real County, Texas. Its 2020 Census population was 307. The estimated median adjusted gross income per tax return is $50,000.

2020 Population
307
Census ZCTA
County
Real
FIPS 48385
Median income (est.)
$50,000
IRS SOI 2022
Land Area
45.242 mi²
+ 0.102 mi² water

01Location & Geography

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

Primary CityRio Frio, TX
CountyReal County (FIPS 48385)
StateTexas (FIPS 48)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.64447, -99.68247
Land / Water Area45.242 mi² land · 0.102 mi² water

02Income & Economics

Distribution of the 140 individual tax returns filed in 78879 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
28.6%
$25K–$50K
21.4%
$50K–$75K
21.4%
$75K–$100K
0.0%
$100K–$200K
28.6%
$200K+
0.0%
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 78879's IRS income metrics, 2020–2022.

Median income (2021→2022)
$50,000
▼ 5.9%
Filers earning $200K+
0.0%
▲ 0.0 pt
Total filers
140
▼ 6.7%
GET /zipc/v2/zipcodes/78879/soi?year=… $50K 2020 $53K 2021 $50K 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 78879 ZCTA.

2000
186
 
2010
264
▲ +41.9%
2020
307
▲ +16.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number487595
City AliasesRio Frio

06Frequently Asked Questions

What county is ZIP code 78879 in?

ZIP code 78879 is in Real County, Texas (county FIPS code 48385).

What city is ZIP code 78879?

The primary USPS city for 78879 is Rio Frio, TX.

What is the population of ZIP code 78879?

The 2020 Census population of 78879 was 307 residents.

What is the median income in ZIP code 78879?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78879 is about $50,000. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.