[3] In the 2021–22 Liga 3, Karo United came out as champions after defeating Putra Delta Sidoarjo, this is their first title in the club's history.

[4] Karo United was declared on 28 July 2019 in Medan City by a board led by the initiator and the club president Arya Mahendra Sinulingga.

[5] In their debut season in the Indonesian football league, Karo United managed to win the 2019 Liga 3 North Sumatra zone after defeating PS Bhinneka with a score of 5–2 and advancing to the Regional Round.

[10] And in the final match, they managed to become champions in Liga 3 this season after beat Putra Delta Sidoarjo on penalties which ended with a score of 4–2.

[12] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.