Lake Nzilo (formerly Lake Delcommune, also Lac del Commune) is a reservoir formed by a hydroelectric dam on the Lualaba River in the Haut-Lomami Province of the southern Democratic Republic of the Congo.

It is about 10 miles (16 km) northeast of the major copper mining area of Kolwezi.

The reservoir was originally named after the Belgian soldier and explorer Alexandre Delcommune.

[5] Although the lake is visibly polluted by the effluent from a copper mine, schistosomiasis seems to thrive and a number of infections have been reported.

[6] As of 2007 the lake was popular with the expatriate community for weekend water sports.