Thelma was born near Flaxton, North Dakota to parents Millerd and Mildred Dammen. The family moved to Oregon in 1938.
She graduated from Eugene High School in 1947 and married Orval Tubbs in 1949. She was a homemaker and a member of First Congregational Church.
Thelma was preceded in death by her husband Orval in 2017, parents, sister Betty, brother Lloyd, and son Larry.
She is survived by her brother Cecil Dammen, children Dale Tubbs, Ken Tubbs, Marilyn Bounds, Marlys Williams, four grandchildren, Julie, Jesse and Jeff Bounds, and Emilee Tubbs.