Baby boomers is a category applied to people born between 1946 and 1964. During this time period, approximately 76.4 million babies were born in the United States. The spike in the birth rate began in 1946 with 3.4 million babies, which was a 20 percent increase from 1945.
Between 1954 and 1964, more than 4 million babies were born annually in the United States. The baby boomer era officially ended in 1965 as the birth rate slowed down. The large increase in population in the United States after World War II contributed to the economic growth during the postwar period.