Central Association / Iowa State League history
| Class D | 1904-1917 |
| Class C | 1947-1949 |
These two leagues did not operate contiguously: the Iowa State League ran from 1904-1907 and then was renamed the Central Association, which ran from 1908 through 1917. The Central Association, which included some of the cities from the old Iowa State League, was revived in 1947 and was active for three seasons.
Teams (in alphabetical order)
Boone Coal Miners, 1904, 1906
Boone Greyhounds, 1905
Burlington Cowboys, 1911
Burlington Indians, 1947-1949
Burlington Pathfinders, 1906-1910, 1912-1916
Burlington River Rats, 1904
Burlington Flint Hills, 1905
Cedar Rapids Bunnies, 1914
Cedar Rapids Rabbits, 1913, 1915-1917
Cedar Rapids Rockets, 1949
Charles City Tractorites, 1917
Clear Lake Rabbits, 1917
Clinton Cubs, 1947-1948
Clinton Miners, 1906
Clinton Pilots, 1914-1917
Clinton Steers, 1949
Dubuque Dubs, 1917
Fort Dodge Dodgers, 1916-1917
Fort Dodge Gypsum Eaters, 1904
Fort Dodge Gypsumites, 1905-1906
Galesburg Pavers, 1910-1912, 1914
Hannibal Cannibals, 1909-1912
Hannibal Pilots, 1947-1948
Jacksonville Braves, 1909
Jacksonville Lunatics, 1907-1908
Keokuk Indians, 1904-1915
Keokuk Pirates, 1947-1949
Kewaunee A’s, 1948-1949
Kewaunee Boilermakers, 1908-1913
LaCrosse Infants, 1917
Marshalltown Ansons, 1914-1917
Marshalltown Brownies, 1906
Marshalltown Grays, 1904-1905
Marshalltown Snappers, 1907
Mason City Claydiggers, 1915-1917
Moline A’s, 1947-1948
Monmouth Browns, 1910-1913
Muscatine Buttonmakers, 1914
Muscatine Camels, 1911
Muscatine Muskies, 1915-1916
Muscatine Wallopers, 1912-1913
Oskaloosa Quakers, 1904-1908
Ottumwa Champs, 1906
Ottumwa Packers, 1907-1910, 1913-1914, 1916
Ottumwa Snappers, 1905
Ottumwa Speedboys, 1911-1912
Ottumwa Standpatters, 1904
Quincy Gems, 1907-1908
Quincy Vets, 1909-1910
Rock Island Islanders, 1914
Rockford Rox, 1947-1949
Waterloo Cubs, 1907
Waterloo Jays, 1913-1915
Waterloo Loons, 1917
Waterloo Lulus, 1908-1909
Waterloo Microbes, 1904-1906
Waterloo Shamrocks, 1916