Jack Daniel Osojnak

Jack Daniel Osojnak

Upcoming Events

Nov

14

Visitation

2:00 p.m. - 4:30 p.m.

Tuthill-Mangano Funeral Home

406 E Main St, Riverhead, NY 11901

Send Flowers

Nov

14

Visitation

7:00 p.m. - 9:30 p.m.

Tuthill-Mangano Funeral Home

406 E Main St, Riverhead, NY 11901

Send Flowers

Only 5 days left for delivery to next service.

Jack Osojnak Obituary

Visit the Tuthill-Mangano Funeral Home - Riverhead website to view the full obituary.

Jack Daniel Osojnak, a beloved husband, father, and grandfather, passed away peacefully in his hometown of Riverhead, New York, on November 7, 2025. Born on July 17, 1934, Jack dedicated his life to his craft as a talented lettering artist, leaving a lasting impact through his art and creativity.

Jack's roots in Riverhead ran deep, where he began his journey and later established a family that he cherished. He is survived by his devoted wife, Frances, who stood by his side through the years, sharing in both the joys and challenges of life. Together, they nurtured a loving family that grew to encompass their sons: Daniel (Veronica), Steven (Marion), Darryl, and David. Jack was not only a father but also a guiding light and source of inspiration for his children.

In addition to his immediate family, Jack found immense joy in being a grandfather to his grandchildren: Lauren, Dominic, Stevie, Michelle, Thomas, and Joseph. His legacy of love and creativity will undoubtedly continue to thrive through them, as they carry forward his zest for life and art.

The family invites all who knew Jack to join them in celebrating his life and contributions. Visitation services will be held at Tuthill-Mangano Funeral Home, located at 406 E Main St, Riverhead, NY, on November 14, 2025. Friends and family can pay their respects from 2:00 PM to 4:30 PM, and again from 7:00 PM to 9:30 PM.

Jack Daniel Osojnak will be remembered not only for his artistic talent but also for his unwavering devotion to his family and community. His warm spirit and creative touch will be deeply missed by all who had the privilege of knowing him.

To plant trees in memory, please visit the Sympathy Store.

Tuthill-Mangano Funeral Home - Riverhead

406 E Main St., Riverhead, NY 11901

How to support Jack's loved ones
Attending a Funeral: What to Know

You have funeral questions, we have answers.

Read more
Should I Send Sympathy Flowers?

What kind of arrangement is appropriate, where should you send it, and when should you send an alternative?

Read more
What Should I Write in a Sympathy Card?

We'll help you find the right words to comfort your family member or loved one during this difficult time.

Read more
Poems of Mourning and Comfort

The best poems for funerals, memorial services., and cards.

Read more
Resources to help you cope with loss
How to Cope With Grief

Information and advice to help you cope with the death of someone important to you.

Read more
Estate Settlement Guide

If you’re in charge of handling the affairs for a recently deceased loved one, this guide offers a helpful checklist.

Read more
How to Write an Obituary

Need help writing an obituary? Here's a step-by-step guide...

Read more
Obituaries, grief & privacy: Legacy’s news editor on NPR podcast

Legacy's Linnea Crowther discusses how families talk about causes of death in the obituaries they write.

Read more
Ways to honor Jack Osojnak's life and legacy
Obituary Examples

You may find these well-written obituary examples helpful as you write about your own family.

Read more
How to Write an Obituary

Need help writing an obituary? Here's a step-by-step guide...

Read more
Obituary Templates – Customizable Examples and Samples

These free blank templates make writing an obituary faster and easier.

Read more
How Do I Write a Eulogy?

Some basic help and starters when you have to write a tribute to someone you love.

Read more

Upcoming Events

Nov

14

Visitation

2:00 p.m. - 4:30 p.m.

Tuthill-Mangano Funeral Home

406 E Main St, Riverhead, NY 11901

Send Flowers

Nov

14

Visitation

7:00 p.m. - 9:30 p.m.

Tuthill-Mangano Funeral Home

406 E Main St, Riverhead, NY 11901

Send Flowers

Only 5 days left for delivery to next service.