Grafton Little League (GLL), based in Grafton, WI, is a not-for-profit 501(c)(3) organization that operates under a charter from Little League International.

Grafton Little League was founded in 1975 with 48 players on four teams in a single division.  In 2019, over 430 players participated on 42 teams in 9 divisions.

A T-Ball division with 16 teams was added in 2014.

After several years of planning and fundraising, Grafton Little League played their first games at their new Little League complex in 2018.

In late 2019, GLL finished construction on a full size Juniors field and began play in 2020; this field is named the Matt Malkowski Memorial Field.

GLL continues to raise funds for the build out, improvement and ongoing maintenance of the GLL Complex.