Daniel was the youngest child of Karl Richard Glasser and Emma Helen Cabel. Daniel had two older siblings, Catherine W. Glasser and Carl F. Glasser. Daniel's brother Carl passed away in February, 1959 in Lombard, Illinois. Daniel's sister, Catherine, passed away on July 15, 1975 in LaGrange, Illinois.
Daniel married Gertrude Zundel on April 11, 1938. They were divorced at some point.