Rockville is a city in St. Clair County, Missouri, home to about 153 people across 0.3 square miles. Its ZIP code is 64780.
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| Nearest major airport | Kansas City International Airport (MCI)90 miles away |
|---|---|
| Closer regional airport | Joplin Regional Airport (JLN)67 miles away |
| Nearest city of 250,000+ | Kansas City, MO76 miles away |
| Nearest city of 1 million+ | Dallas, TX394 miles away |
Straight-line distances from the center of Rockville; 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.
Rockville had 135 residents in the 2020 census, down 17% since 2000.
It’s the 793rd largest of 1,060 towns in Missouri by population.
St. Clair County grew from 17,907 residents in 1900 to 9,284 in 2020.
St. Clair County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 21°F. About 43.5 inches of rain and melted snow fall in a typical year, with about 10 inches of snow.
Source: NOAA 1991–2020 climate normals, Appleton City, MO weather station (9 miles away).
1,222 jobs at 161 businesses in St. Clair 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.