On the evening of June 17, 1972, if Alfred C. Baldwin III (in a nearby hotel as a lookout for the Watergate burglars) had not been so engrossed in a broadcast of this film, he might have sooner warned his colleagues of the two plainclothes detectives who made the historic arrests.

In the scene at the drive-in, Bob and Sally see an earlier Bert I. Gordon film, The Amazing Colossal Man (1957).

Director Bert I. Gordon's daughter, Susan Gordon, was a last-minute substitute for another actress who was ill and unable to work.

The giant phone prop was supplied by the phone company.

This film was rushed into production by American International and Bert I. Gordon to ride the success of Universal-International's The Incredible Shrinking Man (1957)

Film debut of Susan Gordon.

Character actor Hank Patterson, was a stock actor in several Bert I. Gordon films for American International Pictures. First as "Henry" in The Amazing Colossal Man (1957), then as the janitor in Attack Of The Puppet People (1958), also plays essentially the same character "Hugo the Janitor" in another Bert I. Gordon film, The Spider (1958). He also played a character called "Dave" in Bert I. Gordon's The Beginning Of The End (1957).

The Seattle based band Schoolyard Heroes has a song titled "Attack of the Puppet People" that appeared on their debut album "The Funeral Sciences".