Despite the consensus in the literature regarding the importance of organizational abilities in performing daily tasks, currently there is no assessment that focuses exclusively on such abilities among young children. The study aims to develop a Questionnaire for Assessing Preschoolers' Organizational Abilities (QAPOA), Parents' and Teachers' versions, and to examine their reliability and validity. QAPOA was distributed to preschool teachers and parents of 215 typically developing 4-5.6-year-old children. The teachers' and parents' versions demonstrated good internal consistency. Factor analysis performed to examine the tool's content validity yielded two factors: motor-based and language-based OA. Furthermore, both versions of the questionnaire demonstrated significant differences between OA among boys and girls. Concurrent validity was demonstrated between the QAPOA total scores and the equivalent subscale of the BRIEF-P. Given these findings, different cut-off scores were established for identifying boys and girls with either motor-based and/or language-based OA. The results indicate that both the teachers' and parents' versions of the QAPOA are reliable and valid measures of children's organizational abilities. The questionnaires can assess and identify risk for organizational disabilities as early as preschool age. Thus, it can contribute to the planning of appropriate intervention programs and the prevention of difficulties in the future.