Trekkopje is a mountain in the Erongo Region of Namibia, c. 85 kilometres (53 mi) north-east of Swakopmund on the road to Usakos.

When the Swakopmund-Windhoek line was converted from 610 mm (2 ft) to 3 ft 6 in (1,067 mm) in 1910, a patch of railway west of Karibib was not completed, and passengers and load had to be moved twice, in Karibib and at Trekkopje.

Trekkopje was the site of the Battle of Trekkopjes, a World War I battle aimed at preventing South African troops from rebuilding the railway line.

[2] Trekkopje mine, a currently unused Uranium mine of the French company Areva (now Orano) is situated about 20 kilometres (12 mi) north of the mountain.

The desalination plant is situated at the Atlantic coast near Wlotzkasbaken.