The “overwhelming majority” of documents the Justice Department gave Congress in response to a subpoena for all information from its investigation into the disgraced financier Jeffrey Epstein had already been publicly released, the top Democrat on the House’s principal investigative committee said on Saturday.

The Justice Department began sending material on Friday to the House Oversight Committee, which had demanded all records by Aug. 19, providing a total of 33,295 pages.

But Representative Robert Garcia of California, the top Democrat on the panel, said that of the files the committee had received, only 3 percent contained new information. The remaining 97 percent of the pages, he said, had information previously released by the Justice Department, the Florida Department of Law Enforcement or the Palm Beach County State Attorney’s office.

Among those files were video from the Metropolitan Correctional Center in New York from the night of Mr. Epstein’s death; Supreme Court filings from Ghislaine Maxwell, his longtime associate who is serving a 20-year federal prison sentence; a Justice Department inspector general report on Mr. Epstein’s death; and a memo from Attorney General Pam Bondi to Kash Patel, the F.B.I. director.

The only new information, Mr. Garcia said, was fewer than 1,000 pages from the Customs and Border Protection’s log of flight locations of Mr. Epstein’s plane from 2000 to 2014, and “forms consistent with re-entry back to the U.S.”

“There is no excuse for incomplete disclosures,” Mr. Garcia said in a statement. “Survivors and the American public deserve the truth.”