Disputes over the execution of the contract between workers and employers sometimes occur. The settlement of conflicts that exceed the time according to Law no. 2/2004 will be handled by the fields of industrial relations, worker welfare, and social security for workers from the City/Regency Manpower and Transmigration Office. Due to the limited number of mediators, a particular method is needed to increase the number of dispute resolutions available. The dispute data used in this study was from the year 2020 and was obtained from the Semarang City Manpower and Transmigration Office. Data processing is carried out by applying the steps in the CRISP-DM method, including applying the K-Means algorithm. The clustering process based on K-Means Algorithm is started after the data cleaning process and then grouped into 3 parts based on the amount of mediation time and the number of workers. 5 groups of data were obtained after being processed using the k-means algorithm based on the ease of case resolution, the number of workers involved, and the type of dispute problem. The first order for ease of case resolution is held by data groups 0 and 4, then followed by data groups 2 and 3 in second place. The last position is in data group 1