- Spencer's 1938 Best Actor Oscar is inscribed with the name "Dick Tracy".
- Premiere placed Spencer at No.19 on its list of the "Greatest Movie Stars of All Time".
- Spencer was a supporter of the U.S. Democratic Party.
- Three films that Spencer starred in appear on the American Film Institutes's list of "100 Most Inspiring Movies of All Time". They are; Captains Courageous at No.94, Boys Town at No.81 and Guess Who's Coming to Dinner? at No.35.
- In 2006, Spencer's performance as "Henry Drummond" in Inherit the Wind was ranked at No.67 on Premiere magazines list of the "100 Greatest Performances of All Time".
- Spencer was a diabetic.
- Spencer's son John was deaf, and because of this his wife set up the John Tracy Clinic to help deaf people.
- Spencer's last movie was Guess Who's Coming to Dinner, and he died only seventeen days after finishing filming.
- Empire magazine ranked Spencer at No.64 on their list of "The Top 100 Movie Stars of All Time".
- As of 2007, Tracy holds the record, alongside Lawrence Olivier, for the most Academy award nominations for Best Actor. He has a total of nine.
- Even though Tracy had a relationship with Katharine Hepburn while he was married to Louise Treadwell, he refused to get divorced because he was a devout Roman Catholic.
- As of 2007, Spencer is one of only three actors to be nominated for an Oscar for Best Actor posthumously. This occurred in 1968 for Guess Who's Coming to Dinner?.
- Spencer had two children; John and Louise Tracy.
- During his childhood Stacy attended a total of six high schools ; Wauwatosa High School in Wauwatosa, St. John's Cathedral School in Milwaukee, St. Mary's Academy in Topeka, Rockhurst High School in Kansas City and Marquette Academy in Milwaukee, when his family returned their.
- Spencer enlisted in the Navy in 1917 during World War I but never saw action as he remained at Norfolk Navy Yard in Virginia for the duration of the war.
- Spencer was of Irish extraction, as both his grandparents were born there.
- In 1923, Spencer married Louise Treadwell, the founder of the John Tracy Clinic, and they remained married until his death in 1967.
- In 1999, Tracy was placed at No.9 on the American Film Institutes's List of the "Greatest Male Stars of All Time".
- Spencer: Acting is the easiest thing to do, in the world, just as long as you don't get caught.
- Spencer: I'm disappointed in acting as a craft. I want everything to go back to Orson Welles and fake noses and changing your voice. It's become so much about personality.
- Spencer: I couldn't be a director because I couldn't put up with the actors. I don't have the patience. Why, I'd probably kill the actors. Not to mention some of the beautiful actresses.
