Age Groupings

GroupsGirlsBoysMasters
Men and Women
Masters - RELAY
Men and Women
A7&U7&U25-29100-119
B8830-34120-159
C9935-39160-199
D101040-44200-239
E111145-49240-279
F121250-54280-319
G131355-59320-359
H141460-64360-399
I15-161565-69
J17-181670-74
K19&O17-1875-79
L19&O80-84
M85-89
N90-94
P95-99

For Masters relay events, the age groups are determined by the combined age of the team participants in 40 years increments. This allows swimmers of very different ages to compete together in a team, as long as each swimmer is Masters (at least 25 years old).