World Population Timeline By hailee97 1951 1951 2,584,034,000 1961 1961 3,091,843,000 1971 1971 3,775,759,000 1981 1981 4,4,536,996,000 1991 1991 5,414,289,000 2001 2001 6,222,626,000 2011 2011 7,041,194,000 2021 2021 7,870,000,000