US Population Hits 308M Number is up 2.6M, or 1%, over last year By John Johnson, Newser Staff Posted Dec 29, 2009 5:11 PM CST 15 comments Comments One of these guys comes around every 8 seconds or so in the US. (Shutter Stock) (Newser) – When the new year rolls around, the US population will be 308,400,408, give or take a Gosselin. The Census Bureau released the projection today, noting a jump of 2.6 million, or about 1%, over last year. The population is growing by 1 person every 14 seconds—that's 1 birth every 8 seconds, 1 death every 12 seconds, and one new immigrant every 37 seconds, reports Bloomberg. A new decennial survey starts in March.