This paper examines the role of the ICMA in promoting performance measurement during the years of Clarence Ridley’s administration. Clarence Ridley received his Ph.D. at Syracuse University in 1927 and soon, thereafter, became the executive director of the ICMA. His Ph.D. topic constitutes the first book specifically focused on performance measurement. It differs from other performance measurement literature of that era in that it is more instrumental and oriented towards management objectives and standards. In contrast, earlier literature, such as that of Charles Beard or William Munro, provided significant consideration to the performance of government as a political entity. This paper examines the changing concept of governmental performance under Clarence Ridley’s watch.