Catherington Down is a hill, or down, in Hampshire, England. It is a Site of Special Scientific Interest and a Local Nature Reserve.
It rises fairly steeply on its eastern flank. It is managed by Hampshire County Council and Hampshire and Isle of Wight Wildlife Trust.
It is a chalk based grassland similar to the South Downs and is an example of early strip cultivation.
The area is popular with local dog walkers and has a number of footpaths across it.
Catherington Down is accessible via Catherington village via Parsons Field or off Catherington Lane.
Coordinates: 50°55′30″N 1°01′00″W / 50.92491°N 1.01680°W