SIOUX CENTER—Kathy Koerselman, age 70, of Sioux Center, IA, died Friday, June 19, 2020, at Sioux Center Health in Sioux Center.

A private funeral service for immediate family will be held at 10:30 a.m. Tuesday, June 23, at First Reformed Church in Sioux Center, IA, with the Rev. Dr. Travis Else officiating. Interment will follow the service in Memory Gardens Cemetery in Sioux Center, Iowa. Livestream will be available on the church website (, channel 77, and on Facebook Live.

Public visitation with family present will be 5-7 p.m. Monday, June 22, at the Memorial Funeral Home in Sioux Center, IA. Social distancing guidelines will be followed.

In lieu of flowers family prefers memorials be directed to Sioux Center Sack Pack.

Kathleen Alice (Vermeer) Koerselman was born on April 10, 1950, in Orange City, IA, the daughter of Andrew and Charlotte (Mieras) Vermeer. She grew up in Sioux Center and later graduated from Sioux Center High School in 1968. Kathy went on to receive her BA in elementary education from Iowa State University in 1972.

On Aug. 21, 1971, she was united in marriage to John Koerselman at the First Reformed Church in Sioux Center, IA. The couple lived several places throughout their married life, such as Boone, IA, where Kathy taught second grade, and Lake Park, IA, where she managed and taught preschool. They then moved back to Sioux Center, and Kathy was a stay-at-home mom for 18 years and later a volunteer coordinator for Sioux Center Community Schools.

Kathy was an active member of the First Reformed Church in Sioux Center most of her life, where she was an Elder, choir member, Bible study leader, and mentor for young mothers. She also taught and was an originating board member of the Sack Pack in Sioux Center. Her joy and caring touched many lives. She will be greatly missed.

Kathy is survived by her husband of almost 49 years, John Koerselman of Sioux Center, IA; four children, Kerry Koerselman-Griess (Troy Griess) of Sioux Falls, SD, Jill Suresh of Renton, WA, Jeremy (Lisa) Koerselman of Sioux Center, IA, and Kimberly (Ben) Gascoigne of Minneapolis, MN; 10 grandchildren; her mother, Charlotte Vermeer; five siblings, Lee (Karla) Vermeer, Beth Kooiker, Cindy (Les) Cleveringa, Peggy (Steve) Mouw and Emily (Corey) Kleinhesselink; in-laws Wayne Meerdink, Greg (Donna) Koerselman, Corky (Sherri) Koerselman, Vivian (John) Koolstra; and many nieces, nephews and other extended family.

She was preceded in death by her dad, Andrew Vermeer; two brothers-in-law, Dan Kooiker and Dale Koerselman; sister-in-law, Phyllis Meerdink; and father and mother-in-law, Cornie and Elizabeth Koerselman.