Frank W. Vanderhoof, 68, an attorney who practiced law in Washington and Maryland for almost 40 years, died Friday at Prince George's General Hospital in Cheverly of complications resulting from epilepsy.

Mr. Vanderhoof, who was born in New York City, moved to Washington in 1939. He had a number of jobs and also attended Columbus University, where he earned a law degree in 1942. He spent the next few years as an attorney with the Veterans Administration.

He then established his own private practice with offices in Washington, and continued his work here until about 1970. Since then, he had practiced part time from his home in Bladensburg. He was a member of the D.C. and Maryland bar associations.

In 1958, Mr. Vanderhoof was an unsuccessful candidate for the U.S. House of Representatives. He ran on a platform that included a plan for world peace that he had worked out with his father.

His marriage to the former Loretta Lopez, ended in divorce.

Survivors include three daughters, Barbara Schofield and Linda Rucker, both of College Park, and Judith Anderson of Arlington; two sons, Richard, of Washington, and Robert E., of St. Petersburg, Fla.; 13 grandchildren and two great-grandchildren.