Portslade is a western suburb located within the city of Brighton and Hove in the ceremonial county of East Sussex, England. The area's origins date back to Portslade Village, an original settlement established in the 16th century approximately one mile inland to the north.
The development of the coastal region was accelerated by the arrival of the railway from Brighton in 1840. In 1898, the southern portion of the area, previously known as Copperas Gap, was granted urban district status and renamed Portslade-by-Sea to distinguish it from the village. The district was further expanded after World War II with the addition of Mile Oak to the north.
Geographically, Portslade is bisected from east to west by the old A27 road, which connects Brighton and Worthing. This transport route divides the suburb into two sections, each maintaining a distinct character.