The girl, who had gone to the terrace of her house to wash dishes, was allegedly raped by a labourer, who lived next to the house in Gagan Vihar area, duty officer of Sahibabad police station said.
A case of rape has been registered, the officer said, adding, medical examination of the girl was being conducted.
The accused, Pavan Jatav, is absconding and a search to nab him is on, he said.
The incident comes close on the heels of rape and murder of a six-year-old girl in Subash Nagar area of the district.
In both the cases, culprits turned out to be their next door neighbours.