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Greater Austin Mission SocietyState of the City

Zip code · Elgin

78621

78621 is a zip code in the Elgin division of the Austin metro. This page gathers who lives here, from the Census Bureau, and the 38 congregations and 3 ministries the Greater Austin Mission Society knows of in and around it, with how each figure compares with the division and the metro.

Who lives here

  • Residents

    30,411 ±2,687

  • Median age

    36.2 ±1.6

  • Households

    10,175 ±770

  • Homes owned by the people living in them

    8,256 ±756

  • Homes rented

    1,919 ±393

  • Median household income

    $98,534 ±$7,172

Language spoken at home

Share of residents five and over.

  • English only

    55.2% ±7.0 points

  • Spanish

    43.7% ±7.6 points

  • Another language

    Too uncertain to show

2026 edition, ACS 2020-2024, by ZIP Code Tabulation AreaZIP Code Tabulation Area (ZCTA)The Census Bureau's map of a postal zip code, built from census blocks, so the two can differ at the edges.More in the glossary

Who is already here

Congregations and ministries whose address is in 78621, or that sit within a mile of its centre, nearest first.

Congregations

Ministries

Our church database, 2026-10-16 · Our database, 2026-10-16. These are counts of our own records, not a survey, so they carry no margin of error; they are as complete as the database is.

How it compares

Residents per church

About 800, counting the 38 congregations whose address is in 78621

Roughly the same as the Elgin division's figure, and roughly half of the figure across the fifteen divisions.

People cross zip lines to worship, so read this as the zip's share of congregations, not how many people each one serves.

  • Median age

    About the same as the Elgin division's figure, and about the same as the metro figure.

  • Median household income

    Roughly the same as the Elgin division's figure, and about the same as the metro figure.

  • Speaking only English at home

    Roughly the same as the Elgin division's figure, and roughly the same as the metro figure.

  • Speaking Spanish at home

    Roughly the same as the Elgin division's figure, and roughly double the metro figure.

Census figures are for the ZIP Code Tabulation Area, the Census Bureau's approximation of the postal zip, which can differ at the edges. Each carries its margin of errorMargin of errorThe range, at 90 percent confidence, within which a survey figure's true value probably falls, so 1,000 ±100 likely means between 900 and 1,100.More in the glossary at 90 percent; a figure whose margin is wide is marked as a rough estimateA rough estimateA figure whose margin of error is more than about half the figure itself; a figure whose margin passes about two-thirds of it is not shown.More in the glossary, and one too uncertain to read is not shown. Comparisons are with the zip's own division and the metro, never with another zip.

78621 sits inside the Elgin division, and its prayer guide covers these streets.

Pray for ElginSee ElginEvery record near 78621

What the numbers are telling us

The Greater Austin Mission Society writes about the church in this metro: what this data shows, what it does not, and what we think it asks of us. The letters are written for leaders here.

Read the letters