List of Major League Baseball umpires
The following is a list of major league baseball umpires. The list includes umpires who worked in any of four 19th century major leagues, one defunct 20th century major league, the currently active Major League Baseball, or either of its leagues when they maintained separate umpiring staffs.
Major League Umpires
Key
| Currently active |
| No longer active |
| Hall of Fame inductee, for umpiring |
| Hall of Fame inductee, for playing career |
denotes umpires who were former major league players
denotes umpires who were active players
| AA | American Association |
| AL | American League |
| FL | Federal League |
| MLB | Major League Baseball |
| NA | National Association |
| NL | National League |
| PL | Players' League |
| UA | Union Association |
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
- None
Y