James E. Warner (1866–1933) is a former sheriff of Union County who was the namesake of the James E. Warner Plaza at the Cranford Train Station. Appalled by the growing pollution of the Rahway given the pristine waters of his youth, Sheriff Warner advocated for the preservation of the Rahway River and Rahway River Parkway parkland. One of Sheriff Warner's successful targets in fighting Rahway River pollution was his battle against the discharge of paper makers; one such site is now the regional theater known as the Paper Mill Playhouse in Millburn. The Cranford Canoe Club, built in 1908, continues to offer canoes and kayaks for rent on the river in town.