The city of Irmo encompasses the following counties: Lexington, Richland.

Irmo encompasses land area: 4.1 sq mi (10.7 km2), water area: 0.0 sq mi (0 km2). The elevation is 354 ft (108 m) above sea level. This equates to a population density of 2,672.9/sq mi (1,032.0/km2). The local time zone is EST (UTC-5).

Local area codes are 803. The Federal Information Processing Standard (FIPS) code for the city is 45-35890, which is used in computer filings when non-government agencies and contractors fulfill government contracts. Additional information and the official website of the city is found at www.townofirmosc.com.

Short Description
Irmo is a town in Lexington and Richland counties in the U.S. state of South Carolina and a suburb of Columbia. It is 12 miles outside of the city center of Columbia and is part of the Columbia Metropolitan Statistical Area. The population was 11,039 at the 2000 census.

Irmo is located at 34°05′33″N 81°11′10″W / 34.092629°N 81.186073°W / 34.092629; -81.186073 (34.092629, -81.186073).

According to the United States Census Bureau, the town has a total area of 4.1 square miles (10.7 km2), all land.