Jasmen Gonzalez of Oklahoma City was last seen alive about 11:45 p.m. Saturday and her body was found outside another residence about 3:35 p.m. Sunday, WFAA-TV, Dallas, reported.
Police said she had been kidnapped and were interviewing a man they called "a person of interest" Sunday night, the TV station said. No one was under arrest, police said.
An autopsy was to be performed Monday to determine how the girl died.
"There was no trauma on the body," said Carrollton police Lt. Doug Mitchell said.
Jasmen and her parents had traveled from Oklahoma City to visit relatives, WFAA-TV said.