Excluding the action during the opening credits, this film has approximately 1172 shots in 1 hour 53 minutes and 8 seconds, or an average shot duration of about 5.8 seconds.
Former CIA director Richard Helms acted as a personal consultant to Robert Redford for his role as The Condor.
When they are reminiscing, Higgins asks Wabash whether he served with "Col. Donovan" during World War II - a reference to William Donovan, founder of the Office of Strategic Services and precursor of the U.S. Central Intelligence Agency. Wabash replies, "I sailed the Adriatic with a movie star at the helm" - referring to actor Sterling Hayden, who served with the OSS, running the German blockade of the Adriatic during WWII to get supplies to Yugoslav partisans.
Sydney Pollack brought a lawsuit against Danish TV after screening Three Days of the Condor (1975) in pan-and-scan in 1991. The court ruled that the pan scanning conducted by Danish television was a 'mutilation' of the film and a violation of Pollack's 'Droit Moral', his legal right as an artist to maintain his reputation by protecting the integrity of his work. Nonetheless, the court ruled in favor of the defendant on a technicality.
Higgins office is located in the World Trade Center. The balcony from which Turner watches Higgins being tailed by Kathy, figures in the documentary made by to French brothers who took the only footage inside the WTC after the two hijacked airliners had hit the buildings and before they collapsed.