Obituary of Theresa Callahan

Theresa Anne Callahan (nee Cassidy), of Plainsboro, passed away on Tuesday, July 22, 2025 at the age of 97.  Theresa was born on the Upper West side of Manhattan to Irish immigrant parents (Edward Cassidy and Catherine Sheehan).  As a self-described “Women’s Libber”, Theresa believed in the value of women’s education, and earned her High School diploma at night while she worked.  Theresa then enrolled at Hunter College, and earned part of her college degree.  Theresa married Edward Callahan in 1950, and the couple settled on Long Island and raised their 6 children.  In the 1960’s, Theresa went back to school and finished her undergraduate degree in Education at Queens College.  She taught elementary school for 20 years and earned her Masters in Education at night.  Theresa enjoyed the intellectual challenge of teaching and the friendship of her fellow teachers.  Theresa was a devout Catholic and she enjoyed Bible study groups and teaching CCD.  Always quick to laugh, Theresa never lost her sense of humor, even in her last days.  On July 15^th of this year, Theresa and Ed celebrated their 75^th wedding anniversary.  Their marriage and lifelong partnership is the foundation of a large family that reaches across the U.S. and spans many generations.  Theresa will be sorely missed, but we are grateful to have had her in our lives for so long.  Love you, mom.

Daughter of the late Edward Cassidy and Catherine Sheehan, Theresa is predeceased by her son John Callahan, daughter Margaret Callahan Wallerstein, and son Edward Callahan. She is survived by her husband Edward Callahan, son-in-law Barry Wallerstein, son Patrick Callahan and wife Maryann, daughter Kathleen Callahan Henn and husband Doug, daughter Monica Callahan Kiely and husband Kevin; grandchildren Emily Wallerstein Baggs and husband Robert, Brian Wallerstein, Cassidy Wallerstein and husband Corey Parsons, Jessica Callahan Farrell and husband Craig, Patrick Callahan, Daniel Callahan and wife Lauren, Owen Henn, Tara Henn, Erin Henn and husband Jacob Kupferman, Katherine Kiely and husband Ken Brill, Meaghan Kiely, Thomas Kiely, Carolyn Kiely; great-grandchildren Ryan Farrell, Abigail Farrell, Connor Farrell, Ava Baggs, Vivienne Baggs, Jackson Callahan, and Callan Parsons.

A Memorial Mass will be held on Saturday August 2, 2025 11:00 a.m. at the Queenship of Mary Roman Catholic Church located at 16 Dey Road, Plainsboro, NJ 08536

In lieu of flowers, memorial donations can be made to St. Judes Children’s Research Hospital.