Dennis R. Zack, a resident of Fishkill since 1981 and formerly of Yonkers, passed away on Sunday, April 12, 2026 at Montefiore St. Luke's Hospital in Newburgh. He was 76.

Son of the late Robert and Fay Zack, he was born in Bayonne, NJ on October 10, 1949. Dennis served in the Westchester County Police Department for 20 years. He retired as Detective in 1998.

He was an active member of the community, having served as a Town of Fishkill Board Member and later as Police Commissioner. Dennis had a great passion for politics and was the chairman of the Dutchess County Independence Party for many years.

He was a parishioner of St. Mary, Mother of the Church in Fishkill, member of the Knights of Columbus Council #4065, and Past President of the Westchester County Police Retired Officers Association.

As a lifelong bowler, he participated in leagues throughout the region and competed in countless tournaments throughout his lifetime. Dennis was an avid Hudson Valley Renegades fan and season ticket holder since the team's 1994 inaugural season. He also loved to attend Army Football games at West Point.

More than anything else, he cherished his family and was especially proud of his grandchildren. Dennis loved his daily FaceTime calls with his "NC Jecks". He especially loved his calls with his "little honey" Bella and their game of "being done" first.

Survivors include his daughter, Christine Thorbjornsen & her husband Anthony of Poughkeepsie; his son, Robert Porco of NJ; his daughter, Marilyn Knapp of Fishkill; his daughter, Denise Marcio & her husband Frank of NC; his grandchildren: Marisa Thorbjornsen & her partner Kayleigh, Michael Thorbjornsen, Angelina Porco, Abraham Knapp, Chase Marcio, Logan Marcio, and Bella Marcio; his sister, Linda Barnaby; as well as his niece Kelli Little and many other family members.

Calling hours will be held from 5:00pm to 8:00pm on Friday, April 17 at McHoul Funeral Home of Fishkill, Inc., 1089 Main Street, Fishkill, NY. A Mass of Christian Burial will be offered at 10:00am on Saturday, April 18 at St. Mary, Mother of the Church, 106 Jackson Street, Fishkill, NY.

In lieu of flowers, memorial donations may be made to the Town of Fishkill Police Cadets, 801 Route 52, Fishkill, NY 12524 or or Gary Stymiloski Scholarship Fund c/o Westchester County PB, 1 Saw Mill River Parkway, Hawthorne, NY 10532.

For online tributes, visit www.mchoulfuneralhome.com .