ZIP Codes of Robertson County, TX

Population & People
Population & People
Total Population
16,336
Household Income
Household Income
Median Income
$62,677
Housing
Housing
Total Housing Units
8,280
Business & Economy
Business & Economy
Total Businesses
282
Employment
Employment
Employment Rate
52.46%
Education
Education
Bachelor's Degree+
22.22%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:7 ZIP Codes (4 Standard, 3 PO Box, 0 Unique) [See All]
Area Codes:254 / 936 / 979
Timezone:Central (GMT -06:00)
Local Time:11:55:21 PM
Population:16,336 [See All]
FIPS:48395
CBSA:College Station-Bryan, TX
Land Area:814 sq mi
Water Area:8 sq mi
Coordinates:30.9663, -96.5372
Quick Link:
https://www.zip-codes.com/county/tx-robertson.asp
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Texas's #136 most populous county
16,336 residents across 7 ZIPs — #136 of 254 Texas counties.

Standout ZIPs in this County


Most Populous
Hearne · 7,532 people
46.1% of county total
Highest Income
Franklin · $94,785 median
1.5× county average
Largest Land Area
Franklin · 383.8 sq mi
Spans the most ground
Fastest Growth
Franklin · 15.6% (10-yr)
4,769 → 5,515 residents
Most Educated
Franklin · 29.4% bachelor's+
1,071 of 3,643 adults 25+

Things worth knowing about Robertson County


16,336 residents live across 7 ZIPs covering 814 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 15,164 to 16,336 from 2014 to 2024 — a +7.7% change. 4 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 77856 (Franklin, $94,785 median) and poorest ZIP 77867 (Mumford , $35,781) are 26.6 miles apart — a 2.6× income gap across local geography.

Median home values vary 31.8× across this county — from $9,999 in 77867 (Mumford ) to $318,400 in 77856 (Franklin).

Density varies across the county — from 8 people/sq mi in 77837 (Calvert) to 43 in 77859 (Hearne).

Educational attainment ranges from 13.7% bachelor's+ in 77867 (Mumford ) to 29.4% in 77856 (Franklin) — the breadth of educational profiles across the area.

Within Texas, this is the #136 most populous of 254 counties and ranks #165 for median household income with the #76 fastest decade growth .

Weighted by population, the typical household earns about $69,454 across the county — reflecting what a typical resident sees, not a simple ZIP average.

22.2% of adults age 25+ hold a bachelor's degree or higher (2,499 of 11,246 reporting).

4 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Robertson County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
814
square miles
Avg density
20.1
people per sq mi
Population
16,336
across 7 ZIPs
Franklin
383.8 sq mi
5,515 residents
Hearne
173.5 sq mi
7,532 residents
Bremond
135.4 sq mi
2,053 residents

All ZIP Codes in Robertson County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
77859HearneStandard7,532$52,639173.511.3%
77856FranklinStandard5,515$94,785383.815.6%
76629BremondStandard2,053$72,262135.412.9%
77837CalvertStandard1,030$57,917121.8-40.7%
77867MumfordPO Box206$35,7810.0178.4%
77882WheelockPO Box00.0
77870New BadenPO Box0.0

Adjacent & Nearby Counties