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US ZIP Code Profile

ZIP Code 78618
Doss, Texas

ZIP code 78618 is in Doss, located in Gillespie County, Texas, within the Fredericksburg metro area. Its 2020 Census population was 256. The estimated median adjusted gross income per tax return is $58,333.

2020 Population
256
Census ZCTA
County
Gillespie
FIPS 48171
Median income (est.)
$58,333
IRS SOI 2022
Land Area
165.215 mi²
+ 0.152 mi² water

01Location & Geography

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

Primary CityDoss, TX
CountyGillespie County (FIPS 48171)
StateTexas (FIPS 48)
Metro Area (MSA)Fredericksburg, TX Micro Area (23240)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.465162, -99.15623
Land / Water Area165.215 mi² land · 0.152 mi² water

02Income & Economics

Distribution of the 140 individual tax returns filed in 78618 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
28.6%
$25K–$50K
14.3%
$50K–$75K
21.4%
$75K–$100K
0.0%
$100K–$200K
35.7%
$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 78618's IRS income metrics, 2020–2022.

Median income (2021→2022)
$58,333
▲ 0.0%
Filers earning $200K+
0.0%
▲ 0.0 pt
Total filers
140
▲ 0.0%
GET /zipc/v2/zipcodes/78618/soi?year=… $48K 2020 $58K 2021 $58K 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 78618 ZCTA.

2000
225
 
2010
324
▲ +44.0%
2020
256
▼ -21.0%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number482570
City AliasesDoss

06Frequently Asked Questions

What county is ZIP code 78618 in?

ZIP code 78618 is in Gillespie County, Texas (county FIPS code 48171).

What city is ZIP code 78618?

The primary USPS city for 78618 is Doss, TX.

What metro area (MSA) is 78618 in?

78618 is part of the Fredericksburg, TX Micro Area (MSA code 23240).

What is the population of ZIP code 78618?

The 2020 Census population of 78618 was 256 residents.

What is the median income in ZIP code 78618?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78618 is about $58,333. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.