Parallel may refer to:

Mathematics

* Parallel (geometry), two lines in the Euclidean plane which never intersect * Parallel (operator), mathematical operation named after the composition of electrical resistance in parallel circuits

Science and engineering

* Parallel (latitude), an imaginary east–west line circling a globe * Parallel of declination, used in astronomy * Parallel, a geometric term of location meaning "in the same direction" * Series and parallel circuits#Parallel circuits, Parallel electrical circuits

Computing

* Parallel (software), a UNIX utility for running programs in parallel

Language

* Parallelism (grammar), a balance of two or more similar words, phrases, or clauses * Parallelism (rhetoric)

Entertainment

* Parallel (manga), ''Parallel'' (manga) * Parallel (2018 film), ''Parallel'' (2018 film), a Canadian science fiction thriller film * Parallel (2024 film), ''Parallel'' (2024 film) an American science fiction thriller film * Parallel (video), ''Parallel'' (video), a compilation of music videos by R.E.M. * Parallel (The Black Dog album), ''Parallel'' (The Black Dog album), 1995 * Parallel (Four Tet album), ''Parallel'' (Four Tet album) * Parallel (EP), ''Parallel'' (EP), a 2017 EP by GFriend * "The Parallel", an episode of the TV series ''The Twilight Zone''

Music

* Parallel harmony, a music composition technic * Parallel key

Other uses

* Parallel, a type of trench; see Siege#Age of gunpowder * Avinguda del Paral·lel * Parallel (filling stations operator), an operator in Ukraine's oil wholesale and retail markets * Paral·lel station, a Barcelona Metro station