JoAnn Katherine Block, 87, of Rochester, MN, died peacefully on Thursday, April 23, 2026.

JoAnn was born October 17, 1938, in Utica, MN to Rod and Katherine Krenzke. She was raised in Utica and graduated from St. Charles High School in 1957. JoAnn married her childhood friend, Elmer Block, on September 26, 1959, and was a homemaker until their youngest of three kids started first grade. She started working as a Lab Technician at Mayo Clinic and spent her entire career with Mayo.

Following retirement, JoAnn and Elmer spent their summers at their lake home in Cross Lake where they fished, boated, and golfed.

JoAnn is survived her son, Bernie Block; daughters, Stephanie (Terry) Hilleshiem and Katie Kozub; grandchildren, Alex Kozub and Claire Kozub. She is also survived by her sister, Barbara (Willard)Rain and brother Chuck Krenzke as well as many nieces and nephews.

The funeral will be held at 11:00 a.m. Thursday, May 28, 2026, in the River Park Chapel at Macken Funeral Home. Visitation will be held one hour prior to the service. Interment will follow at 2 p.m. at the MN State Veteran's Cemetery in Preston, MN.

Online condolences are welcome at www.mackenfuneralhome.com.