Instagram MAU user ratio in the U.S. 2021, by age group
As of January 2021, users in their 20s accounted for 27.4 percent of Instagram's monthly active user accounts in the United States. According to App Ape, users aged 30 to 39 years were the second-largest user group, accounting for 23.1 percent of the photo sharing app's user base on the Android platform.