The City develops an energy source. Six textile mills close. 1950s First hydro-electric plant is developed. 1959 Chemical Paper is sold to a non-Holyoke firm, Standard Packaging, which closes its Holyoke plants a few years thereafter. 1960 - 1980 Urban Renewal begins as the city's paper industry continues its decline.
Hispanic population arrives.
Boston and Maine Railroad installs five fountains on the second level canal. 1968 Economic recession in Puerto Rico results in emigration to the city by those seeking employment in the tobacco industry. Holyoke celebrates its bicentennial. The Volleyball Hall of Fame established. William Skinner Mill burns to the ground.