This study aims to analyze the characteristics of car-sharing and present the relevant factors to provide reasonable service locations in public apartment houses. In order to analyze the viability and usage of the service, we have considered 10 potential variables. On the basis of the regression analysis result, the adopted significant variables are the number of households, the percentage of residents in the 40’s age group, and the number of households with registered vehicles.This study uses nine months data from 39 apartments for location analysis in public apartment houses. LH is a company to provide public houses and to develop for land uses in Korea.The Happy Car is a closed car sharing service in public apartment houses, uses by people residing within approximately 50public apartment houses in LH. Since closed car-sharing is unfavorable in comparison to other car-sharing services, it is important to demonstrate that the service can succeed in securing a sufficient amount of users. This closed car-sharing service differs from typical services in that, after use, the users return the vehicle to the same parking location. If the closed car-sharing service is cancelled, there is no other alternative for existing users. Therefore, the site selection for the initial introduction of the public apartment houses in a closed car-sharing service is a very important issue. The Happy Car-sharing service was predominantly used by members in the 40’s and 50’s age groups, accounting for 52.3% of the overall rate. The average travel radius suggests that users are preliminarily planning vehicle use, as the average distance travel is short (23.2km) and there is an average of 3.86 transit points per use.The number of the household can be utilized as a major factor, capable of the estimate of usage rate in selecting the location to additionally introduce the Happy Car-sharing services in the future.