St. Clair, MO: Population, ZIP Codes & Nearby Cities

St. Clair, MO is an incorporated town-sized municipality located in Franklin County in the state of Missouri. Our data estimates 5,955 residents, places it at 38.348°N, 90.993°W, and lists it in Central time. This page explains its population rank, ZIP codes, nearby cities and distance to big metros.

What are the key facts about St. Clair, MO?

What is the population of St. Clair, MO?

St. Clair has an estimated population of 5,955. That makes it the 128th largest of the 1,020 places we list in Missouri, and the 5th largest of 15 places in Franklin County. The typical place in Missouri has about 482 residents, so St. Clair is roughly 12.4 times the size of a typical neighbor in the state.

Estimates for places of this size carry wider margins of error than those for big cities, so treat the figure as a guide to scale. Our guide to understanding city population numbers explains why sources disagree.

Places in Missouri with a similar population include Pevely (5,978), Barnhart (5,948), Willard (5,891), Glendale (5,866), Greenwood (5,833). Comparing these pages is a quick way to see how St. Clair differs from communities of the same scale.

How dense is St. Clair?

St. Clair has about 987 people per square mile (381 per square kilometer), which we classify as small-town or exurban. Within Missouri, it is denser than about 65% of the listed places. Homes at this level are spread out with larger lots, and most daily trips involve a car, though a small central area may still be walkable. Read how to interpret population density to see how we draw these lines.

What ZIP codes does St. Clair use?

The postal data lists a single ZIP code for St. Clair: 63077. A single code usually means a compact delivery area, but the same code may also serve addresses just outside the town line. Codes beginning with 6 are assigned to the central Midwest (Illinois, Kansas, Missouri and Nebraska). Learn more in our guide to how ZIP codes work or check any code with the ZIP code lookup.

What time zone is St. Clair in?

St. Clair is in the Central time zone, which is UTC−6 from Coordinated Universal Time in standard time (IANA zone America/Chicago). The area observes daylight saving time, so clocks move forward in March and back in November. The nearest listed place in a different time zone is Vincennes, IN, about 190 miles away, which gives a sense of how far the nearest zone boundary may be. Current local time: see the Central time hub. For the rules behind these zones, read US time zones explained.

Where is St. Clair located in Missouri?

St. Clair lies in the eastern part of Missouri, at 38.348° north latitude and 90.993° west longitude. The state capital, Jefferson City, is about 66 miles to the west. The closest listed place in another state is Columbia, IL, roughly 43 miles to the east, which shows how near St. Clair is to a state line. For big-city services, the nearest place with more than 100,000 people is St. Louis, MO, 45 miles to the northeast.

Which cities are near St. Clair, MO?

The closest listed place to St. Clair is Union, MO, 6.4 miles to the north. Of the eight nearest places below, 4 are in the same county. Distances are straight-line (great-circle) miles measured between place centers; see how distance is calculated.

Which county is St. Clair in?

St. Clair is in Franklin County, which has the Federal Information Processing Standards (FIPS) code 29071. The county contains 15 places in our data, 5 of which have their own page here and 10 smaller communities that appear only in county and state lists. Other places in the county include Washington (14,417), Union (11,990), Pacific (10,661), Sullivan (9,172), Gray Summit (2,699). Codes like this one help separate places that share a name; see the guide to counties and FIPS codes.

How far is St. Clair from major US cities?

Among six major hubs, St. Clair is closest to Chicago, IL at about 298 miles and farthest from Los Angeles, CA at about 1,550 miles in a straight line. Road distances are usually 10 to 30 percent longer. Try the distance calculator for any other pair.

Are there other places called St. Clair?

Yes. Our data lists 3 other places named St. Clair: St. Clair, MI (5,279), St. Clair, PA (2,830), St. Clair, MN (824). When you search for St. Clair, add the state or county so you land on the right one. This page covers the St. Clair in Franklin County, Missouri.

Planning a move to St. Clair?

If you are weighing St. Clair, start with the practical numbers: how far it is from where you live, whether it changes your time zone, and how its size and density compare with your current city. Use the distance calculator to measure the trip from where you live. The radius search tool lists every place within any distance of it. Our checklist for comparing cities explains what to check next.

Where to go next

Population and density come from a compiled dataset and are estimates. They may differ from official Census Bureau counts. Verify important figures at census.gov.