Cover photo for Mary Frances Rust's Obituary
Mary Frances Rust Profile Photo
1924 Mary 2021

Mary Frances Rust

August 14, 1924 — November 2, 2021

Mass of Christian Burial for Mary Frances Courtney Rust Knowlton will be celebrated in Gillette, Wyoming at St. Matthews Catholic Church on Wednesday, November 10 at 11:00 am. Visitation on Tuesday, November 9 from 5-7pm with Rosary prayed at 6pm at Gillette Memorial Chapel. Burial will be in Cheyenne to be determined at a later date.

Mary Frances Rust, 97, peacefully passed away on November 2, 2021 at The Legacy Living & Rehab Center where she had resided since March 2020. She was born in Alliance, Nebraska on August 14, 1924 to Joe and Margaret Courtney, the oldest of four daughters.  She married James H. Rust in 1950.  He preceded her death in 1975.  She married Richard L. Knowlton in 2006.  Richard preceded her death in 2014.  She worked for the Laramie County School District #1 for twenty-five years while raising her family of four children.  She was a wife, mother, grandmother, great-grandmother and friend.  She was a member of Saint Matthew's Church in Gillette and a past member of Saint Mary’s Cathedral in Cheyenne; she was a past member of the Bishops Guild.  Both she and her husband James, were active with the Boy Scout program.  After retiring she volunteered at DePaul Hospital for several years and enjoyed traveling.  She was an avid reader, enjoyed her book clubs, and loved her bible study group.  

Mary Frances is preceded in death by her parents, two husbands, two sisters, JoAnn Wunderlich and Barbara Volpe, three sons, Joseph, Timothy, and Thomas and stepdaughter, Cathy Boone(Bruce). 

 She is survived by her daughter, Renee’ Davis (Tom); son, Jerry Rust (Marlynn); stepdaughter Julie Lubebert(Eric) seven grandchildren, Maggie Grooms (Nicholas), Clifford Davis, Mary Jean Geer (Joey), Thomas Rust, Tyler Rust, Courtney Rust (Jacob) and Alyssa Rust; and, 4 step grandchildren. Five great grandchildren. As well as numerous nieces and nephews.

Mary Fran wished for no flowers/plants as she believed they belonged outside. Please donate to your favorite charity. Condolences may be expressed at

To order memorial trees or send flowers to the family in memory of Mary Frances Rust, please visit our flower store.

Service Schedule

Past Services


Tuesday, November 9, 2021

5:00 - 7:00 pm (Mountain time)

Gillette Memorial Chapel

210 W 5th St, Gillette, WY 82716

Enter your phone number above to have directions sent via text. Standard text messaging rates apply.

Memorial Service

Wednesday, November 10, 2021

Starts at 11:00 am (Mountain time)

St. Matthew's Catholic Church

900 Butler-Spaeth Rd, Gillette, WY 82716

Enter your phone number above to have directions sent via text. Standard text messaging rates apply.


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