Donald Hathaway Valentine Hallock (April 13, 1908 – November 7, 1996) was the eighth Bishop of the Episcopal Diocese of Milwaukee.
He was born in Menominee, Michigan on April 13, 1908, the son of the Reverend Frank Hudson Hallock and Anne Walbridge Brown.
[2] Hallock was ordained deacon on November 25, 1934, and priest on June 16, 1935, by Bishop Benjamin F. P. Ivins.
[4] In October 1951, during the 104th annual council of the diocese, Hallock was elected as Coadjutor Bishop of Milwaukee.
He served as coadjutor bishop from 1952 to 1953 and succeeded as diocesan of Milwaukee on January 1, 1953, a post he retained his retirement in 1973.