From a total population of 11,684, Irmo has a median age of 37.4. The average age of males, in Irmo, is 36.1 while the average age of females is 38.2. When you compare this to median age of South Carolina, Irmo is 0.9 years younger.
The median income of individuals, in Irmo, is $25,396 while the average household income is $55,829. When comparing the median income of people living in Irmo to the rest of South Carolina, the average income in Irmo is $1,174 more.