George Romero produced the film on a $114,000 budget, and after a decade of cinematic re-releases, it grossed some $12 million domestically and $30 million internationally. In 1999, the Library of Congress registered it to the National Film Registry as a film deemed "historically, culturally or aesthetically important".
Night of the Living Dead had a great impact upon the culture of the Vietnam-era United States, because it is laden with critiques of late-1960s U.S. society; a historian described it as "subversive on many levels". Although it is not the first zombie film, Night of the Living Dead is the progenitor of the contemporary "zombie apocalypse" sub-genre of horror film, and it influenced the modern pop-culture zombie archetype. Wikipedia