The large grosses for this film were noticed by Alfred Hitchcock. This led him to create his own low-budget horror film - Psycho (1960).

The $10,000 offered to each of the guests in 1959 would be equal to about $83,450 in 2017.

The opening "Scare Trick" was so effective that it actually started the idea of novelty "haunting records". Records of spooky sounds, sound effects and music - most commonly used for Halloween, Halloween parties, and make-shift haunted house attractions.

Exterior shots of the haunted house, primarily during the film's opening sequence, were filmed at The Ennis Brown House, located in the Los Feliz neighborhood of Los Angeles. Designed by Frank Lloyd Wright and built in 1924, it is listed on the National Register of Historic Places.

The failure of the original copyright holder to renew the film's copyright resulted in it falling into public domain, meaning that virtually anyone could duplicate and sell a VHS/DVD copy of the film. Therefore, many of the versions of this film available on the market are either severely (and usually badly) edited and/or of extremely poor quality, having been duped from second- or third-generation (or more) copies of the film.

The film's opening was something of a jump scare gimmick. The total darkness accompanied by horrible noises echoing in a large movie theater would have been very terrifying in those days. The effect is most likely lost today on modern viewer's watching the film on a smaller television screen without the theatrical sound system, volume and total darkness.

William Castle had related the story of meeting Vincent Price on a day when Price had learned that he had been passed over for a part. Over coffee, Castle described the premise of this picture. Price liked the idea and it led to a two-picture collaboration, this and The Tingler (1959).

Actress Cassandra Peterson (Elvira - Mistress of the Dark) once said on Larry King Live (1985) that this was her favorite horror film.

The popular theme music originally had haunting lyrics by Richard Kayne, but only the orchestral version was used in the final film. For the record, the lyrics went as follows: There's a house on Haunted Hill / Where ev'rything's lonely and still / Lonely and still / And the ghost of a sigh / When we whispered good-bye / Lingers on / And each night gives a heart broken cry / There's a house on Haunted Hill / Where love walked there's a strange silent chill / Strange silent chill / There are mem'ries that yearn / For our hearts to return / And a promise we failed to fulfill / But we'll never go back / No, we'll never go back / To the house on Haunted Hill!

Although this was one of Allied Artists' most profitable films of that period, it fell into the public domain. Despite the widespread availability on home video, the current (2018) holder of the Allied Artists library, Warner Bros., still receives bookings for 35mm release prints.

The final screen appearance of actress Leona Anderson (1885-1973).

Julie Mitchum (sister of Robert Mitchum) was wearing a large Bahá'i ring on the set. The director noticed this and thought it would add a slight bit of mystery to her character so he arranged one shot with an extreme close-up of the ring. The inscription on the stone is Arabic calligraphy that translates as, "God is most glorious."

Alan Marshall, who plays the elegant Englishman among the group hoping to survive a single night in Hill House, had been a popular supporting actor in the 1930s, with prominent roles opposite Greta Garbo in Conquest and Charles Laughton in the 1939 remake of The Hunchback of Notre Dame.His life ended dramatically when he died onstage playing one of Mae West's multiple husbands during a live performance of her play Sextette.

Filmed September 3-16 1958, for December release (copyright 1958).

A cameraman's hand can be seen in one of the upstairs hallway scenes

The final screen appearance of actress Julie Mitchum (1914-2003).

Just before 33 minutes into the film, Frederick Loren (Vincent Price) says, "It's close to midnight Lance." The first verse of the Michael Jackson song 'Thriller' begins with the words, 'It's close to midnight." Vincent Price of course delivers the spooky voice-over on that very same song.

Some of the Emergo equipment still exists. It has been resurrected for use during special showings of the film.

The original Allied Artists theatrical trailer list the title as "The House on Haunted Hill." The main title on the film is simply "House on Haunted Hill."

William Castle: [gimmick] Used a gimmick called "Emergo" in theaters. When the skeleton rises from the acid vat in the film, a lighted plastic skeleton on a wire appeared from a black box next to the screen to swoop over the heads of the audience. The skeleton would then be pulled back into the box as the skeleton in the film is "reeled in". Many theaters soon stopped using this "effect" because when the local boys heard about it, they would bring slingshots to the theater; when the skeleton started its journey, they would pull out their slingshots and fire at it with stones, BBs, ball bearings and whatever else they could find.

Nora Manning is the only one to see ghosts throughout the movie.

Body count: 2 (David Trent and Annabelle Loren, after fall in the acid pit; he off-screen).