1958 Map of Rockford

About this map

The Rock River valley serves as the central artery for this regional survey, connecting industrial hubs like Rockford and Janesville across the Illinois-Wisconsin border. This late-1970s revision of a 1958 base map illustrates the transition from traditional rail-dependent manufacturing centers to a sprawling highway-based economy, with Interstate 90 carving through the agricultural heartland. The landscape is defined by its glacial heritage, featuring the distinct topography of the Kettle Moraine and the broad, fertile expanse of the Big Foot Prairie. In the southeast, the early suburban growth of the Chicago metropolitan area begins to encroach near Elgin and Crystal Lake. Meanwhile, the recreational clusters around Lake Geneva and Lake Koshkonong provide a counterpoint to the working river landscapes of the Pecatonica River and Sugar River. The dense network of the Chicago and North Western railroad still links smaller dairy and trade towns like Monroe and Harvard.