This study aims to investigate preschool children's family functions. To fulfill this aim, mothers' viewpoints and characteristics (e.g., educational level, age, number of children, time spent in Istanbul, relations with spouse, employment status, relatives living in the same house, and perceived economic level) have been considered. The study sample consists of the mothers (n = 897) of 416 girls and 481 boys aged 5 years old (60-72 months) attending 16 preschools in Istanbul. The findings show that less healthy family functions are displayed by young mothers than older ones; primary school graduate mothers than more educated ones; mothers with three children than those with fewer children; mothers who have lived in Istanbul for 20-29 years than those who have lived longer; mothers who have other relatives living with them than those who do not; non-working mothers than working ones; and mothers who stated that they were satisfied and moderately satisfied with their jobs than those who stated they were very satisfied. Other noteworthy findings are that the better the mother perceives her relations with her spouse and the better the economic situation, the healthier the family. The results also reveal that as the number of relatives living with the family increases, family functions become less healthy.