Hardap Recreation Resort, Protected area around Hardap Dam in Hardap Region, Namibia.

Hardap Recreation Resort is a 252-square-kilometre protected area around the Hardap Dam, Namibia's largest dam, on the Fish River. It lies about 24 kilometres west of Mariental and 250 kilometres south of Windhoek. The park covers Nama Karoo dwarf shrubland, open savannah plains and the Gemsbok Plateau, with a game park on the dam's southern side.

The first surveys for a dam at Hardap were made in 1897, but construction only began in 1960 and the dam was completed in 1963 with a capacity of 320 million m³. A rest camp had already opened in 1964, and the surrounding area was proclaimed a national park in 1968. After a four-year, N$40 million renovation, the resort reopened on 1 December 2015.

The name Hardap comes from Nama and means 'nipple' or 'wart', describing the low conical hills around the dam. The site is also a popular angling area, and annual fishing competitions are held there; permits are issued by the Hardap Regional Council office.

Hardap lies about 24 km west of Mariental and 250 km south of Windhoek, reached by road from the B1. Angling and boating need permits from the Hardap Regional Council office, and two day-hiking trails start in the park. The 2015 renovation left 5 VIP bungalows, 15 self-catering family chalets, 30 bush chalets, a dormitory and campsites.

The Hardap Dam holds one of Namibia's three largest breeding colonies of great white pelicans. The reservoir, completed in 1963, covers 25 km² and draws nearly 300 recorded bird species, including African fish eagles, goliath herons and yellow-billed storks.