Zip Code 78621
Elgin, Texas — Bastrop County
📍 ZIP code 78621 is in Elgin, Bastrop County, Texas.
ZIP code 78621 is located in Elgin, Bastrop County, Texas. It is a zip code in the Central (CST/CDT) Time Zone with an estimated population of 27,860. The area code for ZIP code 78621 is 512.
Quick Answer
Zip code 78621 is in Elgin, Texas (Bastrop County). It has a population of 27,860, median household income of $88,246, and median home value of $262,300.
Population
27,860
Income
$88,246
Home Value
$262,300
Climate
95°F / 39°F
About Zip Code 78621
Zip code 78621 is located in Elgin, Texas, within Bastrop County. Home to approximately 27,860 residents, this area sits at an elevation of 551 ft and falls within the Central (CST/CDT) timezone. The local area code is 512.
The median household income is $88,246 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $262,300, and the cost of living index is 102 (2% above the national average of 100).
Summers average a high of 95°F while winters drop to 39°F. The area receives about 36 in of rain annually. The zip code covers 186.7 square miles of land area and 1 square miles of water.
Key Statistics
27,860
$88,246
$262,300
Central (CST/CDT)
512
551 ft
186.7 sq mi
39.2
10,671
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Compare With Nearby Zip Codes
| Metric | 78621 | 78615 | 78650 | 78653 | 78602 | 76578 |
|---|---|---|---|---|---|---|
| City | Elgin, TX | Coupland, TX | Mc Dade, TX | Manor, TX | Bastrop, TX | Thrall, TX |
| Population | 27,860 | 1,540 | 2,679 | 35,417 | 35,786 | 1,561 |
| Median Income | $88,246 | $112,805 | $66,071 | $92,799 | $86,976 | $100,500 |
| Home Value | $262,300 | $348,900 | $247,300 | $328,400 | $310,300 | $315,800 |
| Cost of Living | 102 | 96 | 81 | 113 | 97 | 100 |
| Median Age | 39.2 | 32.4 | 41 | 31.8 | 38.1 | 39.5 |
Cost of Living
100 = National Average. Elgin's cost of living is 2% above the national average.
vs. State Avg
Above
Affordability
Moderate
Income-to-Home
3.0x
Demographics
Zip code 78621 has a population of 27,860 people with a median age of 39.2. There are 10,671 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Elgin (78621) population trend from 2010 to 2024
↑ 112.9%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
95°F
39°F
36 in
0 in
Elgin experiences hot summers with average highs around 95°F. Winters are mild with lows averaging 39°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$262,300
Median Household Income
$88,246
With 10,671 housing units across 186.7 square miles, 78621 has a housing density of 57 units per square mile. The home price-to-income ratio is 3.0x.
Location & Geography
Latitude
30.3389°
Longitude
-97.3618°
Land Area
186.7 sq mi
Water Area
1 sq mi
Nearby Zip Codes
Zip codes closest to 78621 (Elgin, TX) with distances:
Related Cities in Texas
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 78621's $88,246. A way to compare Elgin to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 78621 (Elgin, TX). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Elgin, Texas?
Elgin, Texas uses zip code 78621.
What county is zip code 78621 in?
Zip code 78621 is located in Bastrop County, Texas.
What is the population of zip code 78621?
The population of zip code 78621 is 27,860 with a median age of 39.2.
Is 78621 in Elgin, Texas?
Yes, zip code 78621 is in Elgin, Bastrop County, Texas. The area code is 512.
Frequently Asked Questions
What city is zip code 78621 in?
Zip code 78621 is in Elgin, Texas. It is part of Bastrop County and uses the Central (CST/CDT) timezone.
What is zip code 78621?
Zip code 78621 is a U.S. postal code in Elgin, Texas (Bastrop County). It has a population of 27,860 and covers 186.7 square miles.
What is the population of zip code 78621?
The population of zip code 78621 (Elgin, TX) is 27,860 with a median age of 39.2. There are approximately 10,671 housing units in this area.
What is the median income in zip code 78621?
The median household income in zip code 78621 (Elgin, TX) is $88,246 per year. The cost of living index is 102 (100 = national average).
What is the average home price in zip code 78621?
The median home value in zip code 78621 (Elgin, TX) is $262,300. The cost of living index is 102 compared to the national average of 100.
What county is zip code 78621 in?
Zip code 78621 is located in Bastrop County, Texas. The primary city is Elgin.
What is the area code for zip code 78621?
Zip code 78621 in Elgin, TX uses area code 512. It is located in the Central (CST/CDT) timezone.
Is zip code 78621 a good place to live?
Zip code 78621 (Elgin, TX) has a cost of living index of 102 (100 = national average), a median household income of $88,246, and median home values of $262,300. The median age is 39.2. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 78621?
The cost of living index for zip code 78621 (Elgin, TX) is 102, where 100 represents the national average. This area is above the national average. Median home value: $262,300.
What schools serve zip code 78621?
Zip code 78621 in Elgin, Texas is served by the local school district of Bastrop County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.