This article has been prepared to present the results of recently completed statistical studies on the fishery in the State of Michigan waters of the lake. The tabulations of production of lake trout and the estimates of levels of fishing pressure and abundance in the various statistical districts have been based on the monthly reports submitted by commercial operators to the Michigan Department of Conservation and turned over to the U.S. Fish and Wildlife Service for statistical analysis. To be sure, trends indicated by these statistics may not hold exactly for other areas of the lake. Conditions in Michigan are nonetheless of primary importance since during the last 25 years that state has accounted for nearly half of the entire Lake Superior trout production and for more than 70 percent of the take in U.S. waters.