Ten most populous counties in Missouri, 1990 Projected 2020

                                  1990
         Rank  County          Population

           1 St. Louis          993,529
           2 Jackson            633,232
           3 St. Louis City     396,685
           4 St. Charles        212,907
           5 Greene             207,949
           6 Jefferson          171,380
           7 Clay               153,411
           8 Boone              112,379
           9 Jasper              90,465
          10 Buchanan            83,083

             SCENARIO L            2020
         Rank  County          Population

           1 St. Louis          973,585
           2 Jackson            626,649
           3 St. Charles        391,340
           4 St. Louis City     270,760
           5 Greene             248,222
           6 Jefferson          234,351
           7 Clay               188,879
           8 Boone              156,670
           9 Franklin           105,253
          10 Jasper              98,839

             SCENARIO R         2020  
         Rank County          Population

           1 St. Louis          983,990
           2 Jackson            600,237
           3 St. Charles        383,844
           4 Greene             259,778
           5 Jefferson          254,255
           6 St. Louis City     223,261
           7 Clay               205,792
           8 Boone              166,393
           9 Franklin           111,248
          10 Cass               102,654

             SCENARIO Z            2020
         Rank County          Population

           1 St. Louis        1,075,161
           2 Jackson            725,595
           3 St. Louis City     475,033
           4 St. Charles        270,977
           5 Greene             230,699
           6 Jefferson          206,799
           7 Clay               170,716
           8 Boone              140,187
           9 Jasper             103,516
          10 Franklin            95,562

Source: USDC, Bureau of the Census and
the Missouri Office of Administration