This bulletin presents the statistics of city school systems in 1937-38. The four population groups in this report are as follows: Group I contains 90 cities each having a population of at least 100,000 and each of which constitutes a school administrative unit. Group II contains 212 cities having a population of not less than 30,000 or more than 99,999 and each of which constitutes a school administrative unit. Group III contains 643 cities each having a population of not less that 10,000 or more than 29,999 and each of which constitutes a school administrative unit. Group IV contains 1,944 cities each having a population of not less than 2,500 or more than 9,999 and each constituting a school administrative unit. According to the U.S. Bureau of Census, there were, in 1930, 3,165 cities in the United States each with a population of not less than 2,500. Of these 3,165 cities, each of 2,876 constituted a single school district, and each of 13 others constituted two or more school districts. Data for this report were supplied by the school official in these 2,889 cities. The remaining cities were parts of other school administrative units, such as the county school districts, and hence were not separate city school district organization. (Contains 66 tables, 5 figures and 3 footnotes.) [Best copy available has been provided.]