Horror/gothic focused journals:

Dissections

Irish Journal of Gothic and Horror Studies

Monstrum (I found some pages on their site didn't work for me, but I could access their archives by selecting a specific issue)

Studies in Gothic Fiction

Supernatural Studies

Journals on specific works/authors:

Shirley Jackson Studies (I found this website a little awkward to navigate)

Slayage (focused on Buffy the Vampire Slayer and related texts)

Stephen King Studies

Journals that contain some articles about horror:

Images

Cinesthesia

Offscreen

Journal issues/collections focused on horror:

Collection of studies in horror and the gothic via Nature

Horror Ad Nauseum in Cinephile

Screening the Supernatural in Film Journal

Databases:

Delia Enyedi - Voiceless Screams: Pictorialism as Narrative Strategy in Horror Silent Cinema

Frankenstein (1910) dir. J. Searle Dawley

La Maison Ensorcelée (1908) dir. Segundo de Chomón

1980s Fangoria Magazines

Famous Monsters of Filmland 1-100

Famous Monsters of Filmland 101-200

Misc Cinefantastique

Misc Rue Morgue

Misc Pulp Magazines (includes both horror and non horror related)

Misc Pulp Horror (includes both magazines and other media)

Wrapped in Plastic (Twin Peaks fanzine)

In "There's More Than One Way to Lose Your Heart": The American Film Industry, Early Teen Slasher Films, and Female Youth, Richard Norwell delves into the ways that horror movies, particularly slashers, have been geared toward young women. There seems to have been an underlying assumption by marketers that horror would appeal to men by virtue of being horror, meaning that to maximize their audience they needed to put their effort into making it also appeal to women. In the case of slasher movies, this meant strong female protagonists, and focus on the female characters' platonic and romantic relationships.

Gary D. Rhodes - Selling Bela Lugosi, with and without Added Sugar: Vampires and the American Television Commercial

Noel Mellor - “The souls of the children… Give me strength”: 1980s Horror Movie Marketing and the Life and Death of the Brand Boogeymen