Mile Oak is on the edge of the South Downs and as such has much farmland nearby; the Monarch's Way and Sussex Border Path long-distance footpaths skirt the edge of the built-up area. The first urban development occurred after the Second World War, and the area grew substantially in the 1960s when Copperas Gap dockside dwellings were demolished. The inhabitants were rehoused to the area North of Portslade old village. Mile Oak has been intersected by the A27 dual carriageway since the 1980s which has somewhat cut off the community from the rural surroundings.
The main part of Portslade Community College is at Chalky Road in Mile Oak, and houses a public library. Other local amenities include The Mile Oak Inn public house and Mile Oak Farm.
In 2007, Mile Oak Wanderers were formed and they provide youth football for the boys and girls within the local community. Within a relatively short period of time, the club has grown from having one team of 14 children, to one of the largest and most successful youth soccer club's in Sussex.