The wall collapsed in Laxmanpura village of Jhansi district, about 324 km southwest of Lucknow, the capital city of Uttar Pradesh.
"Yesterday a boundary wall of a stone crusher collapsed, following which several people sitting close to it were trapped under its debris," a police official said. "Five people were killed on spot, while as one person succumbed during treatment in the hospital", Xinhua news agency reported.
Six others pulled out from the debris in injured condition were sent to hospital.
Police have registered the case and started investigations.
Uttar Pradesh Chief Minister Yogi Adityanath has expressed grief over the deaths and expressed sympathy with the bereaved families.