The coordinativeness of associational structures of two local communities are compared, with several operational measures of associational coordinativeness defined and a quantitative scale for measuring associational interlock in community activities is suggested. The two communities compared were in the Southern United States. Twenty-one actions in each community were classified into five major interest fields: agriculture and land use, industry and business, health, services and welfare, and education. Associations were classified as to either coordinating or limited interest, according to their participation in several interest fields. Associational interlock was defined for the purpose of the present study as the degree to which the coordinating associations in a locality in the community field jointly participate in community activities. Results of the study showed that Community A, which could be characterized as following a somewhat autonomous action style, lacked coordination and integration of its community structure in relative terms as reflected in its leadership structure, as well as in associational structure. Community B was characterized by a highly coordinative leadership and associational structures and a unified community field. It had a larger number of coordination associations more intensively participating in activities in several interest fields, a highly interlocking associational structure, and a central coordinating association with great influence on community activities. Seven tables present the study data. (DB)