Thelma Dís Ágústsdóttir (born 30 September 1998) is an Icelandic basketball player for Keflavík of the Úrvalsdeild kvenna.

[3] She helped Keflavík to win the national championship in 2017, defeating reigning champions Snæfell 3–1 in the finals.

[5] Despite interest from colleges in the United States,[6] she returned to Keflavík for the 2017–2018 season,[7] helping them win the 2018 Icelandic Cup.

Following the playoffs, she announced that she would return to Ball State to finish her master's degree and her remaining college eligibility.

[15] She was part of Iceland's squad that won silver at the 2017 Games of the Small States of Europe.