Memorial Middle School announced in an email to student families the passing of Principal Demi Moon.
“It is with deep sadness that I share the news of the passing of Memorial Middle School Principal and friend, Dr. Demi Moon, who passed away on Sunday, May 31, 2026, after a courageous battle with cancer,” wrote Josh Siegfried, Assistant Principal of the Sioux Falls School District school. “Dr. Moon was a dedicated leader at Memorial Middle School and a valued administrator in the Sioux Falls School District.”
The District announced in spring 2025 that Moon had been diagnosed with acute myeloid leukemia.
She was a wife and mother of four, according to her social media. She previously worked as director of middle school curriculum and K-12 ELL (English Language Learner) services for the Sioux Falls School District.
“She was known for always putting students first and for leading with determination, resilience, and compassion. When I think of those qualities, I picture Dr. Moon’s smile and her unwavering commitment to the students, staff, and families she served,” Siegfried said.
“She has been, and will continue to be, a role model for our school community. Dr. Moon’s impact on Memorial Middle School is immeasurable, and she will be greatly missed by all who knew her.”
