Harriet Seymour Hallock Bolz (November 24, 1909 – March 9, 1995) was an American composer based in Ohio.

She graduated from the Cleveland Institute of Music,[1] and earned a bachelor's degree from Case Western Reserve University.

In 1974 her Sweet Jesus was awarded first prize in a choral competition sponsored by the National League of American Pen Women.

[3] In 1965 she was recognized by the National Federation of Music Clubs (NFMC) as winner of an adult non-professional composition competition.

[7] After a 1985 concert at Georgia State University, a reviewer described her Floret, a short piece for piano, as "witty, brilliantly pianistic.