RCHS can refer to many things:
Schools Rock Canyon High School in Highlands Ranch, Colorado Raleigh Charter High School in Raleigh, North Carolina Rancho Cucamonga High School in Rancho Cucamonga, California Rensselaer Central High School in Rensselaer, Indiana Richland Collegiate High School in Dallas, Texas Rochester Community High School in Rochester, Indiana Rockdale County High School in Conyers, Georgia Roman Catholic High School for Boys in Philadelphia, Pennsylvania Rushville Consolidated High School in Rushville, Indiana Rappahannock County High School in Washington, Virginia Roselle Catholic High School in Roselle, New Jersey Rancho Cotate High School in Rohnert Park, California Ruleville Central High School (now Thomas E. Edwards, Sr. High School) in Ruleville, Mississippi Reed-Custer High School in Braidwood, Illinois Richmond Community High School in Richmond, Virginia
Other uses Railway and Canal Historical Society, Great Britain's principal transport history society Royal Caledonian Horticultural Society, the national horticultural society of Scotland