1934 in the Negro Leagues
- BOLD indicates League Champion
 Negro National League
- Source: The Negro Leagues Book by Dick Clark and Larry Lester
- Both the Atlantic City Bacharach Giants and Baltimore Black Sox joined the league in the second half.
 Independent Teams
- Source: Teams list from The Negro Leagues Book by Dick Clark and Larry Lester; records are from The Complete Book of Baseball's Negro Leagues, John Holway
 Leading Players
 Individual accomplishments
Satchel Paige threw his second career no-hitter on July 4 in Greenlee Field in Pittsburgh as the Crawfords beat the Homestead Grays 4-0. Paige struck out 17 in the victory.
Four days later on July 8 in Chicago Paige and the Crawfords were victims of a no-hitter thrown by the American Giants' Willie "Sug" Cornelius. However, the game was scoreless after nine, and the American Giants broke up Cornelius' gem in the 10th with five hits and three runs. Paige won the game 3-0.