The 2021 Winter Cup was an artistic gymnastics competition held at the Indiana Convention Center in Indianapolis.

In past iterations it was only for men’s artistic gymnasts, however, this competition was the first time that women’s artistic gymnasts were included.

[1] The competition featured Senior and Junior competitions for both women's and men's disciplines.

The preliminary competition schedule was as follows:[2] [3] [4] The following individuals participated in the competition:[2] The 12th annual Nastia Liukin Cup was held in conjunction with the 2021 Winter Cup.

Since its inception in 2010,[5][6] the competition has always been held on the Friday night before the American Cup, in the same arena.