Effects of some personal factors upon the perception of crowding were investigated in 132 female college students. The perception of crowding was measured by two questionnaires. Results of the present residential group size demonstrated the hypothesis that the larger the group size the more liable crowding is to be induced. Results of the community size of the past longest residence supported the hypothesis that it does not affect the perception of crowding. Results of the number of friends supported the hypothesis that those who have small numbers of friends are more inclined to induce crowding than those who have large numbers of friends. On the contrary, residential move, family size and degree of obesity were negligible or insignificant determinants of the perception of crowding.