Irwin Molasky (February 22, 1927 – July 4, 2020) was an American real estate developer and philanthropist who played a pivotal role in the growth and modernization of Las Vegas, Nevada. Born in St. Louis, Missouri, to a Jewish family, Molasky served in the U.S. Navy during World War II before moving to Las Vegas in the early 1950s. He co-founded the Molasky Company with his brother-in-law, Moe Dalitz, and established himself as a leading figure in the city's burgeoning real estate sector. Molasky's developments included landmark projects such as the Sunrise Hospital (opened in 1958, the first full-service hospital in Las Vegas), the original Las Vegas Convention Center, various casino and hotel properties including contributions to the Tropicana Hotel and Casino, and other commercial real estate, residential communities, and infrastructure that supported Las Vegas's transformation from a desert outpost to a major entertainment hub. As Chairman of The Molasky Group of Companies, he oversaw a diverse portfolio of ventures that influenced Nevada's economy and urban landscape. He was known for his strategic partnerships with influential figures in the gaming and construction industries, though his career was not without controversy; in the 1970s, he faced scrutiny during federal investigations into organized crime ties in Las Vegas real estate, though no charges were filed against him. A committed philanthropist, Molasky supported Jewish causes through organizations like the Jewish Federation of Las Vegas, as well as healthcare, education, and arts initiatives. He endowed scholarships and contributed to the construction of community centers, reflecting his Midwestern roots and values of community service. Molasky remained active in business until late in life, passing away in Las Vegas at age 93 from complications related to COVID-19. His legacy is evident in the enduring institutions he built, and he is remembered as a quiet but powerful architect of modern Las Vegas, with family ties including his wife, Barbara, and children who continued some of his philanthropic work.