Lenore A. Hinckley, 25, a former Washington resident who graduated magna cum laude with a degree in economics from Georgetown University in 1978, was found dead Aug. 11 in a home in Menlo Park, Calif.

A spokesman with the Menlo Park police said Miss Hinckley was the victim in a murder-suicide. Police said her body and that of James G. Scanlon, 28, an estranged boyfriend, were found on the living room floor of Scanlon's Menlo Park home with bullet wounds in their heads. Scanlon was found with a 9-mm. automatic weapon resting on his chest, police said.

Miss Hinckley, who lived in Stanford, Calif., was a student at the Stanford University Graduate School of Business, where she was working toward a master's degree in business administration. She was working for the summer for Hewlitt-Packard Inc., an electronics company, in Cupertino, Calif.

She was a native of Millville, N.J., and came to Washington in 1974 to attend Georgetown University. She was an economic consultant for the Data Resources Corp. in Washington before moving to California last year.

Miss Hinckley was a member of Phi Beta Kappa.

Survivors include her parents, Thomas B. and Lenore Hinckley, and a sister, Kathleen Parkin, of Millville; another sister, Lynne Fiocchi of Vineland, N.J., and a brother, Thomas L. Hinckley of Milford. N.J.

The family suggests that expressions of sympathy be in the form of contributions to the Lenore Hinckley Memorial Scholarship Fund in care of Georgetown University.