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John Leschke

John Anthony Leschke

Saturday, February 2nd, 2019
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Dr. John A. (Jack) Leschke, age 87, died Saturday morning, February 2, 2019 at Evergreen Retirement Community. He was born on January 18, 1932 in Manitowoc, WI to Rose Victoria (Siebert) and John Sylvester Leschke. Jack graduated from Lincoln High School in 1950. He continued his education at Marquette University and graduated from the Marquette University College of Medicine. After completing his residency in Philadelphia in 1958, he came to Oshkosh and joined Dr. Stan Graiewski in General Practice. In 1970 he went back to school to specialize in anesthesia. Jack was the first full-time anesthesiologist at Mercy Medical Center.

On August 7, 1954, Jack married his childhood sweetheart Shirley Marie Denk at St. Mary’s Catholic Church in Manitowoc. They had six children, eighteen grandchildren, eighteen great-grandchildren and still counting. Jack and Shirley were holding hands when he passed.

Jack was a member of St. Mary’s Catholic Church (now Most Blessed Sacrament) in Oshkosh and was a member of the Knights of Columbus. He gave of his time and treasure to both the church and the school.

Jack loved to golf and was a long-time member of the Oshkosh Country Club. In later years, he and Shirley travelled around the state and country playing at many different courses. He was a devoted Green Bay Packers fan and loved to watch Marquette basketball.

Jack was adventurous and loved to travel. He and Shirley made friends wherever they went and travelled the world visiting friends. Their second home was always their beloved Zihuatanejo, Mexico where they spent at least a month every year.

Most of all, Jack was known for the great gatherings with friends. The Leschke home was a warm place, filled with love and happiness. Jack was most generous with all his blessings. Visitors were greeted with “Come in, can I make you a drink?, come sit by the pool …”. He had a crazy sense of humor (like putting a cast on a sleeping friend’s leg). All generations melded together and there was never a dull moment.

Jack was preceded in death by his parents Rose and John, his sister Lois and brother-in-law Harry Bergner, and his sweet infant grandson Tony Leschke.

He is survived by his wife Shirley; a daughter Linda (Larry) Dorsey of Oshkosh and their children Colin (Kate) Dorsey, Brynn (Greg) Reimann and AnnaShea Dorsey; a son John (Julie) Leschke of Oshkosh and their children Jack (Melissa) Leschke, Joe (Jenna) Leschke, Tom (Laura) Leschke and Jim (Ali) Leschke; a daughter Joan (Kevin) Kelnhofer of Mequon and her children Kristen (Mark) Beauchamp, Allison Skoglind, Jennifer (Chris) Caylor, Elizabeth Skoglind and step children Nick and Kimmie Kelnhofer and Corie (Jay) Aiello; a son David (Karen) Leschke of Omro and his daughter Jenna Leschke and step children Kevin Neubauer and Jennifer Koch; a son Andy (Carrie) Leschke of Oshkosh and their children Michael, Rachel and Ashley Leschke; and a son Tim (Sam) Leschke of Bel Aire, MD and their children Paige and Christopher Leschke. He will be missed by his great-grandchildren, many nieces, nephews, friends and colleagues.

A glorious celebration of life will take place on Friday, February 8th at 11:00 am at Most Blessed Sacrament (St. Mary’s site), 619 Merritt Ave., Oshkosh, with visitation beginning at 9:00 am. In lieu of flowers or donations we ask that you jot down a memory of Jack for our scrapbook. Please bring to the service or e-mail joankelnhofer@gmail.com.
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Service Details

  • Visitation

    Friday, February 8th, 2019 | 9:00am - 11:00am
    Friday, February 8th, 2019 9:00am - 11:00am
    Most Blessed Sacrement Parish, St. Mary Site
    619 Merritt Ave.
    Oshkosh, Wisconsin 54901
    Get Directions: View Map | Text | Email
  • Service

    Friday, February 8th, 2019 | 11:00am
    Friday, February 8th, 2019 11:00am
    Most Blessed Sacrement Parish, St. Mary Site
    619 Merritt Ave.
    Oshkosh, Wisconsin 54901
    Get Directions: View Map | Text | Email


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Private Condolence
Larry and Donna Larson and "YYYYYYnda Stein" aka Lynda Stein have sent flowers to the family of John Anthony Leschke.
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Robert and Lisa Weber

Posted at 05:36pm
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A donation was made in memory of John Leschke

Heartfelt Sympathies Store

Posted at 09:27pm
What a GREAT MAN who lived a wonderful life. Prayers to all for peace during this time. Your DALLAS friends, Valerie Parkey and Karrah Gagnon
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Heartfelt Sympathies Store purchased flowers for the family of John Leschke.


Florence Steinbrecher

Posted at 04:03am
My deepest sympathies. I am sure Ken , Ralph and he are having a wonderful reunion.

Roy Meulemans

Posted at 01:11pm
In memory of Dr. John A (Jack) Leschke
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A donation was made in memory of John Leschke

Larry and Donna Larson

Posted at 10:24am
Sorry your loss Leschke family. Prayers and hugs.
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Larry and Donna Larson purchased the Medium Dish Garden for the family of John Leschke.


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