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The Kolintang competition is one of the traditional music festival competitions held in Indonesia. The competition's winners can come from various groups of people who are determined based on the jury's decision. In general, the group that won the competition was the group that got the best score in performing kolintang music. Implementing the kolintang competition cannot be separated from the involvement of the jury, who is the decision maker for the competition's winner. The problem in deciding the winner of the match was that there needed to be a fixed criterion in judging the playing of kolintang music, which led to a lengthy discussion process from the jury. This research provides a solution by building a Decision Support System for the Selection of Kolintang Winners Using the Technique for Order Preference by Similarity to the Ideal Solution Method to solve complex problems by providing comparisons of alternatives that are ideal solutions. This system was built using the Rational Unified Process methodology as a development guide and Unified Modeling Language modeling as a system design. The programming language used is object-based programming, namely Hypertext Preprocessor. This research results in a Decision Support System that can assist the jury in deciding the winner of the Kolintang competition according to the criteria given.