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Diane M. Horstmann
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Memories and condolences can be left on the obituary at the funeral home website.
Newcomer Cremations, Funerals & Receptions - St. Peters
Posted events
March 18, 2026
Mar
27
Visitation
9:30 a.m. - 10:30 a.m.
Assumption of the Blessed Virgin Mary Catholic Church
403 North Main Street, O'Fallon, MO 63366
Mar
27
Service
10:30 a.m. - 11:30 a.m.
Assumption of the Blessed Virgin Mary Catholic Church
403 North Main Street, O'Fallon, MO 63366
Mar
27
Graveside service
11:30 a.m. - 12:00 p.m.
Assumption of the Blessed Virgin Mary Catholic Church
403 North Main Street, O'Fallon, MO 63366
Newcomer Cremations, Funerals & Receptions - St. Peters
Posted an obituary
March 18, 2026
Diane Horstmann Obituary
Diane M. Horstmann, born August 23, 1951, passed away peacefully on March 18, 2026. Her life was one marked by devotion to family, faith, and community.Diane’s early years were shaped by her education at St. Jerome Catholic Grade School and... Read Diane Horstmann's Obituary