Local communities that had limited urban development due to the long presence of the US forces in South Korea are expecting growth and development through the base return. As there are dozens of bases to be returned and the development plans are constantly being reviewed, it is necessary to investigate how the local communities will change after the USFK bases are returned. In this study, case studies of Camp Hialeah and Camp Castle were analyzed to examine the changes in the local communities. Through the time series analysis, changes in the land price, population, number of businesses, and number of workers were compared between two local communities and their upper administrative areas. As a result, it was confirmed that the urban development projects returning from the military bases have a positive effect on the local communities. In other words, the population has flowed into the local communities and the number of businesses and the number of workers have increased after returning from the USFK bases. Besides, land prices around the bases have increased and various development projects could be actively promoted.