Sheri Lynn Darnick

Sheri Lynn Darnick (Sullivan) of Waupun, WI passed away on Tuesday, February 24, 2026, surrounded by loved ones after a courageous two-year battle with lung cancer.

Born on July 28, 1955 in Princeton, she was the beloved child of Ronald “Sully” and Barbara (Krueger) Sullivan. Sheri had a passion for knitting, crocheting and especially sewing. There wasn’t a pair of pants she couldn’t mend. She enjoyed many things in life, especially bowling, softball and bingo. She was able to share her passion with her daughters, friends and many family members throughout the years. She was a graduate of Waupun High School before graduating Moraine Park Technical College with a degree in Accounting. She worked for Oakbrook Corporation and later invested over 20 years working for the Department of Corrections.

Sheri met Derry in 1974 and they were united in marriage on October 22, 1977 at St. Joseph’s Catholic Church in Waupun. They shared 48 years of marriage, building a life together and raising their two beautiful daughters.

She will be deeply missed by her husband, Derry; her daughters, Jackie (Cory) Zimmerman and Jodi (Nick) Schultz; her grandchildren, Fiona (Brayden) Kok, Alexander Zimmerman, Reece and Rex Schultz; her siblings, Gary (Cindy) Sullivan, Mary Dewitz, Larry (Gail) Sullivan and Teri Schulz; in-laws, Linda Darnick, Dave Darnick, Diane (Walter) Luttenberger, and Doug (Deb) Darnick; special nieces, Roni and Kourtney Schulz, and further survived by many other nieces, nephews, relatives and close friends.

She was preceded in death by her mother and father Barbara and Ronald; parents-in-law, Frances and Alex Darnick; her brothers- and sister-in-law, Kevin Schulz, David Dewitz, Donald Darnick, Dennis Darnick, and Barbara Darnick; and other relatives.

Visitation for Sheri will take place on Sunday, March 8, 2026 at Werner Harmsen Funeral Home from 4:00 p.m. until 7:00 p.m. A service to celebrate Sheri’s life will be held on Monday, March 9, 2026 at Werner Harmsen Funeral Home at 11:00 a.m. with visitation from 9:00 a.m. until the time of the service.