The present study investigated demographic differences in school readiness within Jordan, a particularly interesting context because of wide-spread national reform currently sweeping the education system in Jordan. Teacher reports and researcher direct assessments of the school readiness of a national sample of 4,681 Jordanian first grade children were used to describe the levels of school readiness of children with respect to seven demographic characteristics. Higher levels of school readiness were associated with male gender, higher family income, higher paternal education, higher maternal education, smaller family size, fewer siblings, and urban residence. Taken together, the findings highlight the importance of Jordanian education reform, one aim of which is to improve the school readiness of all children by implementing public kindergartens, especially in poor, rural areas.