Wasn't planning on doing the event this month but figured I could probably squeeze in a new-to-me horror flick per day (on average) if nothing else. With both the Box of Horrors and Nightmares upcoming I should be able to hit 31 films for the month. As per usual, no rewatches count towards this or short films.
Movies viewed during 31 Days of Horror 2019| 29 Needles | Scott Philip Goergens | 2019 |
| Addams Family, The | Conrad Vernon, Greg Tiernan | 2019 |
| Alraune | Arthur Maria Rabenalt | 1952 |
| Antrum | David Amito, Michael Laicini | 2018 |
| Apollo 18 | Gonzalo López-Gallego | 2011 |
| Banker, The | William Webb | 1989 |
| Birdboy: The Forgotten Children | Pedro Rivero, Alberto Vázquez | 2015 |
| Blood of Dracula | Herbert L. Strock | 1957 |
| Bloody Muscle Body Builder in Hell | Shinichi Fukazawa | 1995 |
| Cat Girl | Alfred Shaughnessy | 1957 |
| Conton | Takuro Fukuda | 1987 |
| Convent, The | Mike Mendez | 2000 |
| Countdown | Justin Dec | 2019 |
| Cries in the Night | William Fruet | 1980 |
| Devonsville Terror, The | Ulli Lommel | 1983 |
| Furies, The | Tony D'Aquino | 2019 |
| Ghost Catchers | Edward F. Cline | 1944 |
| Haunted Hospital: Heilstatten | Martin Goeres, Michael David Pate | 2018 |
| Horror Europa with Mark Gatiss | John Das | 2012 |
| Horror Island | George Waggner | 1941 |
| Houses October Built 2, The | Bobby Roe | 2017 |
| Incredible Violence | G. Patrick Condon | 2018 |
| Initiation of Sarah, The | Robert Day | 1978 |
| Itsy Bitsy | Micah Gallo | 2019 |
| Legacy of Satan | Gerard Damiano | 1974 |
| Little Monsters | Abe Forsythe | 2019 |
| Mad Ghoul, The | James P. Hogan | 1943 |
| Malevolence | Stevan Mena | 2004 |
| Man Who Laughs, The | Paul Leni | 1928 |
| Mausoleum | Michael Dugan | 1983 |
| Mirror Mirror | Marina Sargenti | 1990 |
| Mr Vampire Saga 4 | Ricky Lau | 1988 |
| Mr. Vampire II | Ricky Lau | 1986 |
| Mr. Vampire III | Ricky Lau | 1987 |
| Necromancer | Dusty Nelson | 1988 |
| Obsessed, The | Domiziano Cristopharo, Jacopo Tomassini, Iva Cakalli | 2019 |
| Office Killer | Cindy Sherman | 1997 |
| Piercing | Nicolas Pesce | 2019 |
| Puppet Killer | Lisa Ovies | 2019 |
| Quiet Place in the Country, A | Elio Petri | 1968 |
| Raven, The | Roger Corman | 1963 |
| Retribution | Guy Magar | 1987 |
| Return to Horror High | Bill Froehlich | 1987 |
| Sakuya: The Slayer of Demons | Tomo'o Haraguchi | 2000 |
| Scare Package | Noah Segan, Emily Hagins, Baron Vaughn, Aaron B. Koontz, Chris McInroy, Anthony Cousins, Hillary Andujar, Courtney Andujar | 2019 |
| She-Creature, The | Edward L. Cahn | 1956 |
| Slaughterhouse Slumber Party | Dustin Mills | 2019 |
| Touch of Satan, The | Don Henderson | 1971 |
| Uncanny Annie | Paul Davis | 2019 |
| Under the Bed | Steven C. Miller | 2012 |
| Undying Monster, The | John Brahm | 1942 |
| Vampire Bat, The | Frank R. Strayer | 1933 |
| Voodoo Woman | Edward L. Cahn | 1957 |
| Waxwork | Anthony Hickox | 1988 |
| Wounds | Babak Anvari | 2019 |
| XX | Karyn Kusama, Jovanka Vuckovic, Roxanne Benjamin, St. Vincent | 2017 |
| Z | Brandon Christensen | 2019 |
| Zombieland: Double Tap | Ruben Fleischer | 2019 |