"...Count Yorga, which has snatches of seedy insight into the paraphernalia of vampirism and, in Robert Quarry, the best chief vampire I have seen in years. But the special appeal of Count Yorga may well be its Los Angeles locale...Count Yorga's ambience is pure Hollywood, and the seamy elegance of Robert Quarry's performance as a mysterious medium who has a handy supply of spirits of the dead lying around down-stairs exactly compliments that ambience. Bob Kelljan's direction, often resourceful, does especially well by Quarry's disdainful civility-particularly toward Dr. Hayes (Roger Perry), his principal adversary...There are other pleasures. Count Yorga's rented mansion features a gothic basement-complete with three toothsome female vampires breathing heavily in diaphanous gowns while waiting to do their master's bidding."
- Roger Greenspun, The New York Times

"This low-budget modern-day vampire movie is primitive but not unimaginative. ...The flip humour and gruesome effects have lost the novelty value that appealed to cult audiences in 1970, but Yorga remains an intriguing off-shoot to the vampire family tree."
- Tom Charity, TimeOut

"A semi-professional film that looks it but amid the longueurs provides one or two nasty frissons."
- Halliwell's Film & Video Guide

"For most of the film's well-paced length, writer-director Robert Kelljan seems to have a good thing going. The script is literate, the situations well thought through and the dialogue natural and inventive. Something goes very seriously wrong near the end though, and the multiple trick endings which leave everyone either dead or a vampire is frantic, silly and not at all credible. Up until this we find ourselves believing in the film."
- John R. Duvoli, Cinefantastique

"This movie set in contemporary Los Angeles adopts a manner at once offbeat and strangely matter of fact...The low-key treatment offsets authentically nasty moments like that in which Lang is discovered devouring a cat, and Quarry.....cuts a commanding figure."
- The Encyclopedia of Horror Movies

"Low-budget horror film, which has awful lighting and make-up, was quite popular because genre fans were starved for a new vampire. Quarry is effectively evil as Yorga, but I wish there were more nuances to his character. Could this be the first horror film in which young lovers are attacked while in their van? (Probably not.) Lengthy, terribly directed, bloody finale in the Count's castle is amusing."
- Danny Peary, Guide for the Film Fanatic

"Originally planned as a sex film, this contemporary version of the tale was shot for just $65,000.....Director Kelljan works marvels with his limited budget and offers some genuinely scary moments.
- Channel 4 Film

Quarry makes for a very menacing vampire, one who is able to be charming at will, yet subject to fits of temper and animalistic behavior...the script has some interesting twists, such as the effort of the heroes to drop in on the Count in the wee hours of the morning and attempt to keep him up past sunrise. Quarry is at his most menacing here, with a barely controlled rage bubbling under the surface of his feigned civility. A number of points, including the ending, seem to be swipes from Polanski's The Fearless Vampire Killers (1967). This notably includes the odd makeup of the Count's deformed henchman, here called Brudah (Edward Walsh). There are a few sizable lapses as well. Dr. Hayes insists that there must be vampires because it has never been proven that there aren't. Aside from the logical silliness of this argument, it certainly sets him up to be laughably credulous."
- Mark Zimmer, DigitallyObsessed.com

"Goofy today, trendy when released."
- John Stanley, Creature Features "Fast-paced and convincing"
- Leonard Maltin's Movie Guide

"In one of the best vampire movies of the early '70s, Quarry is excellent as the sardonic Bulgarian vampire....It's funny and scary in about equal proportions, with...a jolting, if predictable, surprise ending."
- James O'Neill, Terror on Tape