Control and coordination linkages are integral features of the system of cities, but few studies have directly measured them. This study examines the structure and degree of these linkages in the context of ecological theory. The results provide support for the hypotheses derived from the theory. Linkages are hierarchically organized, and the regional metropolis and higher-level metropolises at the national scale occupy pivotal positions as intermediaries for lower-level metropolises. Although national links are important, interurban links that include the regional metropolis and its hinterland cities remain a major factor in the system of cities even in a society that is often characterized as shifting from a local/regional to a national orientation.