What city is ZIP code 78621?

ZIP code 78621 is in Elgin, TX (Bastrop County).

What county is ZIP code 78621 in?

ZIP code 78621 is mostly in Bastrop County, Texas.

How many people live in ZIP code 78621?

About 30,411 people live in the 78621 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 78621

Elgin, TX, Bastrop County

Population

30,411

Land area

177.7sq mi

People per sq mi

171

City

Elgin

ZIP 78621 and nearby ZIP codes

Full map

ZIP 78621 at a glance

ZIP 78621 (Elgin) is 48% denser than Texas as a whole.
The median household income is $98,534, 26% above the Texas median of $78,476.
A typical owner-occupied home is valued at $320,800 (13% above Texas) and median rent is $1,387 a month.

Local data for ZIP 78621

Counts from official public data

Housing and community stats

ZIP 78621, American Community Survey 2020-2024

Full profile

Median household income

$98,534

Poverty rate

6.4%

Median home value

$320,800

Prices +7.6% in a year

Median rent

$1,387/mo

Homeownership

81.1%

Bachelor's or higher

24.3%

Median age

36.2

Average commute

37.5 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

401

ZIP Business Patterns 2023

Employees

4,513

$244M annual payroll

PPP loans

$15.9M

403 loans

Campaign donations

$169K

27% D, 27% R, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 78621, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Moderate

Top: tornado

Storm events since 1996

408

Countywide, mostly hail

Flood insurance policies

474

1.3% of homes, county

July high / Jan low

95° / 39°F

36.1 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 78621, CDC PLACES estimates

All 40 measures

Obesity

39.6%

U.S. 33.3% +6.3 pts

Diabetes

13.2%

U.S. 12.1% +1.1 pts

Smoking

14.0%

U.S. 12.8% +1.2 pts

Uninsured (18-64)

21.8%

U.S. 11.1% +10.7 pts

Frequently asked questions

What city is ZIP code 78621?: ZIP code 78621 is in Elgin, TX (Bastrop County).
What county is ZIP code 78621 in?: ZIP code 78621 is mostly in Bastrop County, Texas.
How many people live in ZIP code 78621?: About 30,411 people live in the 78621 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.