What is the largest city in the county containing the majority of SR 37?
Florida State Road 37: State Road 37 (SR 37) is a state highway which runs from SR 62 at Duette, Florida north to Lakeland. Florida State Road 37:  The road primarily runs through Polk County, with small sections in Hillsborough and Manatee counties. Polk County, Florida: Polk County is located in the State of Florida. Polk County, Florida:  Its county seat is Bartow, and its largest city is Lakeland.
Lakeland