Where is Boulder located?

Boulder, IL is located at latitude 38.6967100 and longitude -89.2256300. It is in United States.

What is the elevation of Boulder?

Boulder, IL has an elevation of 142 meters (466 feet) above sea level.

What time zone is Boulder in?

Boulder, IL is in the America/Chicago time zone.

What state is Boulder in?

Boulder is in the state of Illinois, United States.

What county is Boulder, IL in?

Boulder is in Clinton County, Illinois.

Boulder, IL - Geographic Facts & Maps

Boulder: a city in Clinton County, Illinois.

About

Boulder is a city located in the county of Clinton in the U.S. state of Illinois.

Quick Facts about Boulder

State	Illinois (United States)
County	Clinton County
Latitude & Longitude	38.6967,-89.2256
Time Zone	America/Chicago
Local time	15:13:01 (9th November 2026)
Weather	43℉ Mostly Clear 7-days weather

Geography

Boulder is located at 38°41'48"N 89°13'32"W (38.6967100, -89.2256300).

Boulder map

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Weather

43°F

Mostly Clear

1 to 5 mph NW Tonight

Mostly clear, with a low around 43. Northwest wind 1 to 5 mph.

7-Day Forecast

Services and Civic Places in Boulder

1Township Hall

19610 Boulder Rd, Boulder, IL 62283 View details

Nearby Schools and Colleges

Schools and campuses linked to Boulder, IL. Select a name to open its map and contact details.

Code	Name	City	ZIP
146366	Kaskaskia College	Centralia (IL)	62801
145372	Greenville University	Greenville (IL)	62246
147013	McKendree University	Lebanon (IL)	62254-1291

Nearby Transit Stations (11)

Rail and bus stations connected to Boulder, IL. Select a station to open its map and address details.

Code	Name	Address	Type
CEN	Centralia station	108 East Broadway	RAIL
MVI	Mt. Vernon, IL	102 Potomac Boulevard	BUS
EFG	Effingham	401 West National Ave.	RAIL
DQN	Du Quoin	20 North Chestnut St.	RAIL
ALN	Alton	3400 College Ave.	RAIL

Nearby Post Offices

Closest post offices linked to Boulder.

Post Office Name	City	ZIP
Keyespor Post Office	Keyesport (IL)	62253

Other cities in Clinton County

Cities, towns, neighborhoods & other populated places in Clinton County , IL.

City Name	Population	Title
Breese	4,538	City in Illinois, USA; suburb of Greater St.
New Baden	3,205	City in Illinois, United States of America
Carlyle	3,148	City in Illinois, United States
Trenton	2,566	City in Illinois
Aviston	2,156	Village in United States of America

Boulder, Illinois