| Southwestern League | |
| Formerly: | Longhorn League |
| Sport: | Minor League Baseball |
| Replaced: | Sophomore League |
| President: | Will Kimmel (1904) D.F. Smith (1904) Ensley Barbour (1921–1923) J.W. Harris (1924) Dale Gear (1925–1926) W. J. Green (1956–1957) |
| Inaugural: | 1887 |
| Teams: | 42 |
| Country: | United States of America |
| Continent: | or |
| Continents: | --> |
| Folded: | 1957 |
| Most Champs: | 2 Hobbs Sports |
| Classification: | Independent (1887) Class D (1904, 1921) Class C (1922–1923) Class D (1924–1926) Class B (1956–1957) |
The Southwestern League was the name of four former minor league baseball leagues that operated in the Southwestern United States. The second league, also known as the Oklahoma State League, was in operation for the 1904 season. The third league operated from 1921 to 1926. The fourth league, formerly the Longhorn League, operated from 1956 to 1957 before changing its name to the Sophomore League.
| Southwestern League | |
| Sport: | Baseball |
| Inaugural: | 1889 |
The following teams were members of the first Southwestern League (in alphabetical order):
| Southwestern League | |
| Sport: | Baseball |
| Inaugural: | 1904 |
| Folded: | 1904 |
The following teams were members of the second Southwestern League (in alphabetical order):
| Southwestern League | |
| Sport: | Baseball |
| Inaugural: | 1921 |
| Folded: | 1926 |
In 1923, Mose Solomon hit 49 home runs for Hutchinson, according to Topps and the 1977 card back of Paul Blair.
The following teams were members of the third Southwestern League (in alphabetical order):
| Southwestern League | |
| Sport: | Baseball |
| Inaugural: | 1956 |
| Folded: | 1957 |
In 1947 the Longhorn League began play with teams in New Mexico and Texas. In 1956 the league changed its name to the Southwestern League, played for two seasons, and then changed its name again (to the Sophomore League). The 1957 season ended with only four teams.
The following teams were members of the fourth Southwestern League (in alphabetical order):