Irmo Homes For Sale (Richland County) Irmo SC 29063 is divided between two counties, Richland and Lexington County. $Browse By Price Below$ Homes From$0-99KHomes From $100-199KHomes From $200-299K Homes From $300-399KHomes From $400-499KHomes From $500-500K Homes From $600-699KHomes From $700-799KLuxury Homes Irmo, SC 29063 (Richland County) Irmo SC 29063 is divided between two counties, Richland and Lexington County. Click here for homes in 29063 Lexington County Click Here To View Larger Map