Sukhna Lake in Chandigarh, India, is a reservoir at the foothills (Shivalik hills) of the Himalayas. This 3 km² rainfed lake was created in 1958 by damming the Sukhna Choe, a seasonal stream coming down from the Shivalik Hills. Originally the seasonal flow entered the lake directly causing heavy siltation. To check the inflow of silt, 25.42 km² of land was acquired in the catchment area and put under vegetation. In 1974, the Choe was diverted and made to bypass the lake completely, the lake being fed by three siltation pots, minimising the entry of silt into the lake itself.

The lake was created by Le Corbusier and the Chief Engineer P L Verma. To preserve its tranquility, Corbusier insisted on two things: that it be forbidden for motor boats to circulate in the water, and for vehicular traffic to be prohibited on top of the dam (promenade). The lake is fringed by a golf course to the south, and Nek Chand's famous Rock Garden of Chandigarh to its west. Earlier some crocodiles were also found in this lake.

Earlier it was known as Chakraborty Lake after Birendra Narayan Chakraborty, Governer of Haryana - 1967 to 1976.

The lake is facing serious issues like weed overgrowth,[5] catchment adequacy[6] and silting[7]that are significantly shrinking its size and depth. A project team, under Parasu Ram Mishra, was deployed to address the issue and take remedial measures, which halted the sedimentation, for a while.[8] Additionally, it has become the subject of litigation between Chandigarh and Punjab.[9][10]

Silting has taken its toll and the volume of the lake has been reduced to 56% of its original. The lake is shrinking rapidly due to siltation and lack of inflow.[11]It was initially hoped that the work of desilting could be undertaken in summers at a war footing and dry dredging could be undertaken at a fraction of cost to save Sukhna in the coming years. Unfortunately, the ground realities seem to be different. Due to heavy rain in August and September Sukhna was filled up again and flood gates were being opened