The inauguration of George H. W. Bush as the 41st president of the United States was held on Friday, January 20, 1989, at the West Front of the United States Capitol in Washington, D.C. This was the 51st inauguration and marked the commencement of the only term of both George H. W. Bush as president and Dan Quayle as vice president. Chief Justice William Rehnquist administered the presidential oath of office to Bush and Justice Sandra Day O'Connor administered the vice presidential oath of office to Quayle.^[1] Bush was the first sitting vice president to be inaugurated as president (not due to his predecessor's death or resignation) since Martin Van Buren in 1837 and the last World War II combat veteran. Bush composed his own prayer for the ceremony which he recited at the start of his inaugural address; the last president to do so was Dwight D. Eisenhower at his first inauguration in 1953.

The event helped the Washington Metro set a single-day record of 604,089 trips, breaking the record of 565,000 set the spring before by the Washington for Jesus '88 rally. The record would stand until the day of the National Victory Celebration in 1991.^[2]

Bush recited the following, as prescribed by the Constitution:

I, George Herbert Walker Bush, do solemnly swear that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States. [So help me God.]

• Presidency of George H. W. Bush
• Presidential transition of George H. W. Bush
• Timeline of the George H. W. Bush presidency (1989)
• 1988 United States presidential election
• George H. W. Bush 1988 presidential campaign