James O’Donnell Allen, 76, of Oak Park, died of cardiovascular disease on May 30, 2026. Born on Oct. 4, 1949, a fifth generation Chicagoan, he lived in Oak Park most of his life with his mother. He and Catherine shared much in common, including their intelligence – both were Mensa members – and their occupation as court reporters.
Transcribing some of Chicago’s most notorious cases, he developed an interest in crime mysteries and became an avid writer of several, including a novel of historical fiction co-written with Catherine. They also researched and wrote about their genealogy, traveling to Ireland where they transformed vital records into vital friendships that fostered a sense of connection throughout their lives.
In retirement, he served the Oak Park community for 15 years as a volunteer in the nonprofit Economy Shop, benefitting numerous local charities.
Jimmy will be remembered by his cousins, Leslie, Lynn, and Laura, as a compelling storyteller whose knowledge of history and turn-of-phrase vividly brought the past to life.
Jimmy, was the son of Catherine Mary Allen (nee Walsh) and the grandson of Margaret/Marjorie Walsh (nee O’Donnell) and John Timothy Walsh, who predeceased him.
As plans are being made to celebrate his life this autumn in Oak Park, please let us know if you are interested in attending by leaving a message with your email address in the online guestbook at http://www.conboywestchesterfh.com/obituary/james-allen. We also hope that you will share your stories of Jimmy there.
Arrangements were handled by Conboy-Westchester Funeral Home.