Louis Wiener, Jr. was born on March 28, 1915 in Pittsburgh, Pennsylvania. He moved to Las Vegas, Nevada in 1931 and graduated from Las Vegas High School in 1932. He attended the University of Nevada, Reno (UNR) and the University of California (UC) Berkeley School of Law. When Wiener was admitted to the Clark County Bar Association, there were only 16 other attorneys in Las Vegas.