Viewers who contribute voluntary rankings of films to various websites are generally unimpressed with They Came from Beyond Space. The 1,245 viewers who ranked the film at IMDb give it a score of 4.5 out of 10. A score of 2.43 of 5, based on 733 'votes', is recorded at Rotten Tomatoes. The 33 rankers at Letterboxd give it a similar score of 2.4 of 5, while a low 1.5 of 5 is the result of five votes at AllMovie. And Rate Your Music gives the film 2.37 of 5, based on 31 user ratings, and ranks it as the 392nd-most-popular movie of 1967.
