# List of interleague minor league postseason series

Since the 1902 foundation of the National Association of Professional Baseball Leagues, commonly known as Minor League Baseball, various leagues have held interleague series in the postseason between their champions or other qualifiers.
| Series | Leagues | Years |
| New England Championship | Connecticut League, New England League | 1903, 1905–1906 |
| Little World Series | American Association, International League | 1904, 1906–1907, 1917, 1920–1931 |
| Iowa State Series | Iowa State League, Three-I League, Western League | 1905 |
| Dixie Championship | South Atlantic League, Virginia League | 1906 |
| Midwest Championship | Iowa State League, Wisconsin State League | 1907 |
| Carolina Championship | Carolina Association, Eastern Carolina League | 1909 |
| Dixie Championship | South Atlantic League, Southern Association | 1909, 1919 |
| New York versus Pennsylvania Series | New York State League, Tri-State League | 1909 |
| Kansas versus Nebraska Series | Eastern Kansas League, M.I.N.K. League | 1910 |
| Northern Championship | Minnesota–Wisconsin League, Wisconsin–Illinois League | 1910 |
| Carolina versus Virginia Series | Carolina Association, Virginia League | 1911 |
| Class D Series | Blue Grass League, Kentucky–Illinois–Tennessee League | 1912 |
| Western Championship | American Association, Western League | 1912 |
| Virginia Series | Appalachian League, Virginia League | 1912 |
| Class B Championship Series | Eastern Association, New England League | 1913, 1914 |
| Michigan State Championship | Michigan State League, Southern Michigan Association | 1913 |
| Minor League Championship | American Association, Western League | 1913, 1916 |
| Minor League Championship | American Association, Southern Association, Western League | 1914 |
| Virginia-North Carolina Series | North Carolina State League, Virginia League | 1914–1915 |
| Junior World Series | American Association, Pacific Coast League | 1919 |
| Dixie Series | Southern Association, Texas League | 1920–1958 |
| Border Series | Texas–Oklahoma League, Western Association | 1921 |
| Class B Championship Series | Central League, Michigan–Ontario League | 1921 |
| Class D Series | Southwestern League, Western Association | 1921 |
| Little World Series Tune-up | Eastern League, International League | 1922–1925 |
| Class A Series | Western League, Southern Association | 1922 |
| Class B Southern Championship | South Atlantic League, Virginia League | 1922–1923 |
| Five-State Championship | Blue Ridge League, Eastern Shore League | 1922–1927 |
| Lone Star Series | East Texas League, Texas Association | 1924, 1926 |
| Class AA Series | American Association, Pacific Coast League | 1924 |
| San Francisco-Louisville Series | American Association, Pacific Coast League | 1925 |
| Southern Championship | South Atlantic League, Virginia League | 1925–1927 |
| Northern Championship | Three-I League, Michigan State League | 1926 |
| Mid-Western Championship | Three-I League, Western League | 1926 |
| Eastern Championship | New York–Penn League, New England League | 1926 |
| Eastern Championship | New York–Penn League, Eastern League | 1926, 1930 |
| Class B Championship | New York–Penn League, Virginia League | 1927 |
| Eastern Championship | Eastern League, International League | 1927, 1929 |
| Southern Championship | Southeastern League, South Atlantic League | 1927–1928, 1930 |
| Texas Class D Championship | Lone Star League, West Texas League | 1928 |
| Tri-State Series | Middle Atlantic League, Blue Ridge League | 1928–1929 |
| Eastern Series | New England League, Eastern League | 1929 |
| Midwest Championship | Central League, Three-I League | 1929–1930 |
| Junior World Series | American Association, International League | 1932–1934, 1936–1962, 1970–1971, 1973–1974 |
| Midwest Series | Western League, Mississippi Valley League | 1933 |
| Pan American Association | Mexican League, Texas League | 1959–1961 |
| Dixie Series | Southern League, Texas League | 1967 |
| Kodak World Baseball Classic | American Association, International League, Pacific Coast League, Hawaii Islanders (PCL), Caribbean All-Stars | 1972 |
| Triple-A World Series | American Association, International League, Pacific Coast League | 1983 |
| Triple-A Classic | American Association, International League | 1988–1991 |
| Triple-A World Series | International League, Pacific Coast League | 1998–2000 |
| Triple-A National Championship Game | International League, Pacific Coast League | 2006–2019, 2022–present |