ZIP Codes of Grimes County, TX

Population & People
Population & People
Total Population
33,280
Household Income
Household Income
Median Income
$75,361
Housing
Housing
Total Housing Units
13,376
Business & Economy
Business & Economy
Total Businesses
572
Employment
Employment
Employment Rate
49.22%
Education
Education
Bachelor's Degree+
20.81%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 8 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:8 ZIP Codes (6 Standard, 2 PO Box, 0 Unique) [See All]
Area Code:936
Timezone:Central (GMT -06:00)
Local Time:2:13:55 PM
Population:33,280 [See All]
FIPS:48185
Land Area:969 sq mi
Water Area:16 sq mi
Coordinates:30.5574, -95.9492
Quick Link:
https://www.zip-codes.com/county/tx-grimes.asp
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Texas's #90 most populous county
33,280 residents across 8 ZIPs — #90 of 254 Texas counties.

Standout ZIPs in this County


Most Populous
Navasota · 18,416 people
55.3% of county total
Highest Income
Anderson · $102,557 median
1.4× county average
Largest Land Area
Navasota · 270.4 sq mi
Spans the most ground
Fastest Growth
Navasota · 23.4% (10-yr)
14,926 → 18,416 residents
Most Educated
Iola · 32.0% bachelor's+
672 of 2,097 adults 25+

Things worth knowing about Grimes County


33,280 residents live across 8 ZIPs covering 969 sq mi, served by 8 distinct USPS-recognized cities.

Population moved from 28,961 to 33,280 from 2014 to 2024 — a +14.9% change. 4 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 77830 (Anderson, $102,557 median) and poorest ZIP 77831 (Bedias, $58,229) are 14.1 miles apart — a 1.8× income gap across local geography.

Median home values vary 1.8× across this county — from $195,200 in 77831 (Bedias) to $350,000 in 77830 (Anderson).

Density varies across the county — from 16 people/sq mi in 77873 (Richards) to 68 in 77868 (Navasota).

Educational attainment ranges from 16.7% bachelor's+ in 77868 (Navasota) to 32.4% in 77873 (Richards) — the breadth of educational profiles across the area.

Within Texas, this is the #90 most populous of 254 counties and ranks #73 for median household income with the #43 fastest decade growth .

Weighted by population, the typical household earns about $71,455 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.8% of adults age 25+ hold a bachelor's degree or higher (4,750 of 22,821 reporting).

6 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Grimes 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
969
square miles
Avg density
34.4
people per sq mi
Population
33,280
across 8 ZIPs
Navasota
270.4 sq mi
18,416 residents
Bedias
228.0 sq mi
3,676 residents
Anderson
201.5 sq mi
3,238 residents

All ZIP Codes in Grimes County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
77868NavasotaStandard18,416$67,890270.423.4%
77831BediasStandard3,676$58,229228.012.0%
77363PlantersvilleStandard3,468$75,27855.8-0.1%
77830AndersonStandard3,238$102,557201.517.9%
77861IolaStandard3,065$67,275126.24.5%
77873RichardsStandard1,383$80,93886.6-4.3%
77876ShiroPO Box340.0-78.5%
77875Roans PrairiePO Box00.0

Adjacent & Nearby Counties