what percentage of the us population is adults
Demography of the United States There were about 125.9 million adult women in the United States in 2014. The number of men was 119.4 million. At age 85 and older, there were almost twice as many women as men (4 million vs. 2.1 million). People under 21 years of age made up over a quarter of the U.S. population (27.1%), and people age 65 and over made up one-seventh (14.5%).[10] The national median age was 37.8 years in 2015.[11]
Religion in the United States The majority of U.S. adults self-identify as Christians, while close to a quarter claim no religious affiliation.[2] According to a 2014 study by the Pew Research Center, 70.6% of the adult population identified themselves as Christians, with 46.5% professing attendance at a variety of churches that could be considered Protestant, and 20.8% professing Catholic beliefs. The same study says that other religions (including Judaism, Buddhism, Hinduism, and Islam) collectively make up about 6% of the population. According to a 2012 survey by the Pew forum, 36% of U.S. adults state that they attend services nearly every week or more.[3] According to a 2016 Gallup poll, Mississippi (with 63% of its adult population described as very religious, saying that religion is important to them and attending religious services almost every week) is the most religious state in the country, while New Hampshire (with only 20% of its adult population described as very religious) is the least religious state.[4]