Overflow may refer to:

Computing and telecommunications Integer overflow, a condition that occurs when an integer calculation produces a result that is greater than what a given register can store or represent Buffer overflow, a situation whereby the incoming data size exceeds that which can be accommodated by a buffer. Heap overflow, a type of buffer overflow that occurs in the heap data area Overflow (software), a NASA-developed computational fluid dynamics program using overset (Chimera) grids Overflow condition, a situation that occurs when more information is being transmitted than the hardware can handle Overspill, a proof technique in non-standard analysis, is less commonly called overflow Stack overflow in which a computer program makes too many subroutine calls and its call stack runs out of space

Other Overflow (company), a Japanese video game developer River overflow, a relatively long and significant increase in the water content of a river, causing a rise in its level Sanitary sewer overflow, a condition whereby untreated sewage is discharged into the environment, escaping wastewater treatment "Overflow", a 2023 song by Polaris from the album Fatalism "Overflow", a 2024 song by Linkin Park from the album From Zero The Overflow, New South Wales, Australia