Irmo is located in South Carolina. Irmo, South Carolina has a population of 11,581. Irmo is less family-centric than the surrounding county with 26.12% of the households containing married families with children. The county average for households married with children is 27.33%.
The median household income in Irmo, South Carolina is $81,380. The median household income for the surrounding county is $56,137 compared to the national median of $69,021. The median age of people living in Irmo is 39.6 years.
The average high temperature in July is 93 degrees, with an average low temperature in January of 30.3 degrees. The average rainfall is approximately 44.8 inches per year, with 0.9 inches of snow per year.