Born March 26, 1920 in Kassel, Germany, Rudoph Adler managed to escape to England before the German borders closed to Jews after the Nazis took power, and thereafter found his way to Canada. After marrying Rose Anisman (of Toronto) in 1946, they moved around Canada and the United States, including spending time in Montreal, Saskatchewan, and Cleveland before settling in Orlando, Florida in 1960 where he would lead Congregation Ohev Shalom until 1990. Rabbi Adler continued performing services (such as officiating at funerals) for several more years after "retirement" as Rabbi Emeritus. Adler also founded the Greater Orlando Board of Rabbis, wrote a weekly column in the Heritage Florida Jewish Newspaper for many years, and served as a chaplain at the Orlando Naval Training Center and a Winter Park nursing home. In addition, Adler frequently visited and provided council to Jewish inmates at jails in central Florida.
Adler remained in Florida until his death on September 19, 2016 at the age of 96.
Rudolph Adler and his wife Rose met at a Young Judaea meeting in Toronto, and married on February 24, 1946; together they had two sons (Paul and Allan) and a daughter (Rae).