Search by Name

Search by Name

BORN

1927

DIED

2025

FUNERAL HOME

Coltrin Mortuary & Crematory

2100 First St.

Idaho Falls, Idaho

Cornelius Mahoney Obituary

It is with great sadness that we announce the passing of our father, Con Mahoney.

He was born in Dorchester, MA., to Matthew and Margaret Mahoney in 1927. After completing his education in the Boston area, he joined the U.S. Navy Seabees at age 17. He served his country for 2 years in the Philippines. Upon his honorable discharge, he returned to Massachusetts.

In 1948, he married his wife of 70 years, Marie. They went on to have seven children: Christine, Tommy, Cheryl, Connie, Janice, Damian, and Vince. In the mid-1950s, Con and family moved west to the Los Angeles area of California. Following multiple years of work on the Nautilus submarine project, Con was reassigned to Idaho Falls.

In 1967, Con made the brave move to open his own mechanical contracting business in Idaho Falls, Atlas Mechanical. He retired and sold his business in 2001.

Con participated in many civic and political organizations over the years. Beginning in Rockland, MA., as a young city council member, he would later serve several terms in the Idaho House of Representatives. He headed many National and State organizations, such as the IF Chamber of Commerce, NAPHCC, and SMACNA. He was also the Idaho Small Businessman of the Year.

He is preceded in death by his loving wife, Marie, and two sons, Tommy and Connie. He is survived by his other 5 children: Christine Mahoney, Cheryl Barnett, Janice Mahoney (Jeff Wahlgren), Damian Mahoney, and Vince (Stephanie) Mahoney.

Private services will be held at a later date. Cremation is under the direction of Coltrin Mortuary, 2100 First Street, Idaho Falls. Online condolences may be sent to www.coltrinmortuary.com.

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

Published by Post Register on Dec. 22, 2025.

Memories and Condolences
for Cornelius Mahoney

Sponsored by Coltrin Mortuary & Crematory.

Not sure what to say?





1 Entry

Cheryl and Joe Gellings

December 29, 2025

Dear Cheryl and Family,
We are So sorry to hear of the passing of your Father. Although it has been many years ago. I remember your Dad from our visits to your parents home.
Glad to see he lived such a long and successful life. May He rest in Peace and may you all find comfort in your Memories.

Showing 1 - 1 of 1 results

Make a Donation
in Cornelius Mahoney's name

Memorial Events
for Cornelius Mahoney

To offer your sympathy during this difficult time, you can now have memorial trees planted in a National Forest in memory of your loved one.

Funeral services provided by:

Coltrin Mortuary & Crematory

2100 First St., Idaho Falls, ID 83401

How to support Cornelius'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 Cornelius Mahoney'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