Each region has a different level of investment capability which causes the investment attractiveness in an area to be different. By knowing the level of investment capability in an area, the government can plan a strategy to increase the realization of investment in the area. Regional clustering could help and assist the central and regional government to construct strategic planning in order to increasing investment based on potential available. In this study, we use Density-based Spatial Clustering of Applications with Noise as a clustering method. The results showed that seven factors of regional investment potential / capacity had correlation above 50% with investment realization of provinces in Indonesia. Provinces were clustered into three clusters, with epsilon and minpts parameters is 6.8 and 3 for investment potential, and 0.85 and 2 for investment realization.