Flow may refer to:

In science and technology:

• Dataflow, computing term related to the flow of messages between software components
• Environmental flow, the amount of water necessary in a watercourse to maintain a healthy ecosystem
• Flow (computer networking), a sequence of packets from a source to a destination
• Flow (mathematics), a variable that depends on time
• Flow (psychology), a psychological state where a person is fully immersed and focused on an activity or task
• Flow chemistry, a chemical reaction run in a continuous stream
• Flow cytometry, a technique for counting, examining and sorting microscopic particles suspended in a stream of fluid
• Flow network, a directed graph where each edge receives a flow
• Fluid flow or Fluid dynamics, the motion of a gas or liquid
• Mass flow rate, the movement of mass per time
• Stock and flow, a quantity measured over an interval of time in economics and finance
• Volumetric flow rate, the volume of a fluid which passes through a given surface per unit of time
• WebMethods Flow, a graphical programming language used in the webMethods Integration Server
• Workflow, a reliably repeatable pattern of activity or process usually involving multiple tasks with a specific set of outcomes

In modern culture:

• flOw, a computer game
• Flow (album), an album by Foetus
• Flow (band), a Japanese group,indie band from South America
• Flow (journal), an online journal of television and media studies
• Flow (movie), a documentary
• Flow (policy debate), a form of note-taking in policy debate
• Flow (television), the sequencing of TV material from one element to the next
• Flow binding system, snowboard bindings
• "The New FLOW 93.5" or CFXJ-FM, a radio station in Toronto, Canada
• Rap Flow, the delivery of a rap music vocal performance, defined by prosody, cadence, and speed.