Jess Nevins (born 1966) is an American author and research librarian best known for annotated guides and encyclopedias covering Victoriana, comic books, genre fiction and pulp fiction. Among Nevin's books are Encyclopedia of Fantastic Victoriana, Horror Fiction in the 20th Century and Encyclopedia of Golden Age Superheroes. He has been a recipient and finalist for a number of honors, including the World Fantasy, Sidewise, and Locus Awards.

Nevins is married with one son and is a life-long fan of comic books. Nevins received his Master of Library and Information Science from Simmons College in 1996 and has previously worked as a research librarian at Sam Houston State University in Huntsville, Texas and at the University of California at Riverside. He is currently employed as a reference librarian at Lone Star College-Tomball.

Nevins has annotated a number of comic books, starting with several Elseworlds published by DC Comics including Kingdom Come and JLA: The Nail. He first encountered literary annotation in college, with the footnotes in T. S. Eliot's "The Waste Land" making a big impact on him.

Nevins has annotated many of Alan Moore's comics, including spending four years creating notes for The League of Extraordinary Gentlemen. Nevins published his notations to The League of Extraordinary Gentlemen online, with his work called "an excellent guide" that "highlights Moore's homage to Victorian style."

Moore said of Nevins' work, "It was only when someone finally conveyed these internet postings to me... that I began to understand the invaluable asset that Jess represented... I realised that if we had [him] tracking down all of the references for the readers, then we could be as obscure and far-reaching as we wanted...", Moore later said Nevins' work helped inform The League of Extraordinary Gentlemen, Volume II: "The New Traveller's Almanac": "The patient work contained within this current volume [Heroes & Monsters] has played an important part in the construction of this vast, imaginary global edifice that we're constructing... [the Almanac]", Moore sees "these companion volumes as having a necessary organic place in the body of the work itself."

In-between volumes of LoEG, Nevins has tackled Moore and Gene Ha's Top Ten. He subsequently provided annotations on Moore and Ha's 2005 Top Ten graphic novel The Forty-Niners and Paul Di Filippo and Jerry Ordway's 2005 sequel miniseries Beyond the Farthest Precinct. Nevins also annotated Neil Gaiman and Andy Kubert's 2003 mini-series 1602 from Marvel Comics.

Nevins initially compiled several reference guides on his website including The Golden Age Heroes Directory, the Pulp and Adventure Heroes Directory, and Fantastic, Mysterious, and Adventurous Victoriana. He later expanded some of these online resources into print, including in The Encyclopedia of Fantastic Victoriana.

In May 2007, McFarland & Company published his Pulp Magazine Holdings Directory, a listing of which issues of pulp magazines are held in American, Canadian, British, and European libraries. In 2016, McFarland released his book The Victorian Bookshelf: An Introduction to 61 Essential Novels. In 2013, he wrote Fables Encyclopedia with Bill Willingham for Vertigo Comics, with each entry examining the historical origins of characters along with how Fables reworked them.