The importance of family support, parental education, and parental attachment are expected to contribute to the development of children's cognitive aspects. The research objective is to determine the effect of family environment and parental education level through parental attachment to children's cognitive development. This research uses quantitative with the explanatory method, namely cause, and effect. This research population is 415, with a sample of 204 people selected by the proportional sampling technique. The research used a questionnaire to collect the data. Data analysis used regression analysis and path analysis. The results show an effect of the family environment on children's cognitive development of 0.248. The level of education of parents is 4,587. Parent attachment is 0.333. There is an effect of the family environment on the attachment of people of 0.459. The level of parental education on parental attachment is 7,682. There is an indirect effect of the family environment through the parental attachment of 0.031. There is an indirect effect of parental education level through parental attachment to the cognitive development of 0.641. It is suggested that parents understand well how to educate their children so that they can provide independence to children and understand themselves in the future.