How many uniform numbers have been retired by the New York Yankees?

The Yankees have retired 14 numbers to honor 15 players. They are:

1 – Billy Martin
3 – Babe Ruth
4 – Lou Gehrig
5 – Joe DiMaggio
7 – Mickey Mantle
8 – Yogi Berra
8 – Bill Dickey
9 – Roger Maris
10 – Phil Rizzuto
15 – Thurman Munson
16 – Whitey Ford
23 – Don Mattingly
32 – Elston Howard
37 – Casey Stengel
44 – Reggie Jackson

As part of a tribute to Jackie Robinson, the Yankees, along with all other teams, also retired #42 in 1997.