Margaret “Peggy” Casey was born in Louisville, Kentucky where her father was the city editor of the local newspaper. Peggy attended college at the University of Wisconsin during World War II. After graduating, she worked for an aeronautical company, Curtiss-Wright, where she helped build planes for the war.
By 1952 Peggy was married to Walt Casey, whom she met through her sister, and they had moved to Las Vegas. In 1959, Peggy joined the Mesquite Club, which is the oldest federated women’s club in Las Vegas. The club painted trees, started the public library, and was involved in many worthy causes. She also became a Master Gardener and has helped in many gardening projects around the city.