| Hardy Detective Agency: Fan site with information about the books and Hardy Boys fan fiction. |
| Hardy-Boys.com: Features information about the books and TV shows, a message board and the Bayport Gazette newsletter. |
| Journal of the Hardy Boys Literary Society: Features many tongue-in-cheek articles about the Hardy Boys. |
| Leslie McFarlane - Haileybury: Hometown tribute to the first series author. Includes biography, title lists, reunion information, and an analysis of whether Haileybury is really the fictional Bayport. |
| Lost In The Past Presents The Hardy Boys: Features information on the 1970's ABC TV show. |
| Matt's Hardy Boys Books: Features cover scans of various editions of the series, dust jacket and endpaper styles, publication dates, and identification notes. |
| Moonstar Presents: The Hardy Boys: Features many Hardy Boys fan fiction stories by a wide variety of authors. |
| Perky fellows in a gay-looking speedwagon: The Hardy Boys return: Salon Magazine's brief article on the history of the Hardy Boys and the reissue of the original stories. |
| Quizzes: Hardy Boys: Fan-created tests of knowledge about the books and characters. |
| Remembering Hardy Boys author Leslie McFarlane: CBC audio interview with the original Hardy Boys author, Leslie McFarlane. |
| SkyWarp's Hardy Boys Casefiles: Includes cover scans, character appearances, locations guide, forums, book summaries, and site updates. Also includes information on the Hardy Boys: Undercover Brothers series. |
| The Hardy Boys Cartoon Info: List of Filmation's animated series of the late 1960s and early 1970s. |
| The Hardy Boys in Norway: Provides a history of the series as published in Norway, cover scans, back cover text, title information, and publishing timeline. |
| The Hardy Boys Unofficial Home Page: Provides details of books and television shows, as well as FAQ, cover art scans, message board, and the Bayport Times newsletter. |
| The Hardy Boys Unofficial Online Resource: Features character profiles, articles, series history, reference books, title checklist, polls, a FAQ, and a record of Frank and Joe's travels. |
| The Hardy Boys/Nancy Drew Mysteries Fan Site: Features information on the ABC-TV shows of the 1970s. |