The majority of the 43 men who became president were sworn in by the chief justice, but at least seven presidents were not. According to Wikipedia, "from 1789 through 2013, the swearing-in has been administered by 15 Chief Justices, one Associate Justice, three federal judges, two New York state judges, and one notary public." In fact, it is customary rather than mandatory for the chief justice to give the oath-- among the presidents not sworn in by the chief justice were George Washington, Calvin Coolidge, and Lyndon Johnson. (Johnson was the only president sworn in by a woman-- Sarah T. Hughes, a district court judge.)
The oath of office has been administered by the Chief Justice in recent years .
Chief Justice
The Presidential Oath of Office
The Oath of Office will be Administered to President-elect Barack H. Obamaby the Chief Justice of the United States The Honorable John G. Roberts, Jr.
10.6%George Washington is the only U.S. President to date whose Inauguration Day swearing-in was administered by someone other than the Chief Justice (in both 1789 and 1793). That's 3.5% of the 57 Inauguration Days to date.For the nine Presidents who assumed office mid-term due to the death or resignation of the preceding President, only four of them had the oath administered by the Chief Justice, either initially or as a follow-up; 55.6% did not.
The Honorable Chief Justice of the United State Supreme Court William Rhenquist.
chief justice
Chief Justice of the United States Supreme Court, John Roberts
He took the oath of office on March 14, 1861 for the first time administered by then Supreme Court Chief Justice Robert B. Taney who was Chief Justice from March 28, 1836 till October 12, 1864.
Chief Justice John Roberts administered the oath to Obama for the second time.
Chief Justice John Marshall, who had been appointed to the Court by President Thomas Jefferson's predecessor, John Adams, administered Jefferson's Oath of Office on March 4, 1801. Jefferson was sworn in what was then the new Senate Chamber (now the Old Supreme Court Chamber) of the partially constructed Capitol Building.
The Oath of Office was administered by the Chief Justice of the United States, John G. Roberts.