Twelve
There have been twelve "Friday the 13th" movies to date, including "Part II" (1981), "Part III" (1982), "Part IV: The Final Chapter" (1984), "Part V: A New Beginning" (1985), "Part VI: Jason Lives" (1986), "Part VII: The New Blood" (1988), "Part VIII: Jason Takes Manhattan" (1989), "Jason Goes to Hell: The Final Friday