The present study examined predictive power of behavioral self-regulation, family and child characteristics on children's number sense. The participants consisted of 101 kindergarten children. A subsample of 30 children was randomly chosen for the reliability procedures of Assessing Number Sense and Head, Toes, Knees and Shoulders instruments. Thus, data from 71 children were used for further analysis. Multiple regressions using stepwise method were computed for determining whether self-regulation, family income, parents' level of education, gender, and age related to and were predictive of scores on number sense. Results of the study indicated that behavioral self-regulation, mothers' education level, gender and age are significant predictors of number sense, and behavioral self-regulation was the most influential predictor, followed by mothers' education level, gender and age. Findings are discussed in terms of influential factors of number sense in early childhood.