Moriarty may refer to:
- Moriarty (name), an Irish surname
Places
- Moriarty, New Mexico, United States, a city
- Moriarty Air Force Station, a closed United States Air Force radar station
- Mount Moriarty, British Columbia, Canada
- Moriarty, Tasmania, a locality in Tasmania, Australia
- Moriarty Rocks, Tasmania, Australia
- 5048 Moriarty, a main-belt asteroid
Arts and entertainment
Fictional characters
- Professor Moriarty, Sherlock Holmes' nemesis
- Jim Moriarty, one of the main antagonists in the British TV series Sherlock
- Jamie Moriarty, aka Irene Adler, in the TV series Elementary
- Moriarty, aka Mira Troy, in the 2022 movie Enola Holmes 2
- Jack Moriarty, in the Holmes-inspired television series House
- Count Jim Moriarty, character in The Goon Show
- Dean Moriarty, in the novel On the Road by Jack Kerouac
- Moriarty, in the 1970 film Kelly's Heroes
- Colin Moriarty, crime boss and owner of Moriarty's Saloon in the video game Fallout 3
- Mark Moriarty, in the 1993 DOS game Eagle Eye Mysteries
<!--*Moriarty, from "In Error" in Rudyard Kipling's Plain Tales from the Hills-->
Other
- Moriarty (band), a French-American group
- Moriarty (novel), by Anthony Horowitz
- Moriarty (podcast), a mystery drama podcast