Rock Island is a community in Colorado County, Texas, home to about 414 people across 5.0 square miles. Its ZIP code is 77470.
Mostly Rock Island
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| Nearest major airport | William P. Hobby Airport (HOU)78 miles away |
|---|---|
| Closer regional airport | Victoria Regional Airport (VCT)51 miles away |
| Nearest city of 250,000+ | Houston, TX73 miles away |
Straight-line distances from the center of Rock Island; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
It’s the 1329th largest of 1,778 towns in Texas by population.
Colorado County grew from 22,203 residents in 1900 to 20,557 in 2020.
Colorado County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 98°F in summer, and winter lows average 39°F. About 45.1 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Columbus, TX weather station (12 miles away).
6,733 jobs at 563 businesses in Colorado County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.