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Thepresidency of William McKinley began on March 4, 1897, whenWilliam McKinley wasinaugurated the 25thpresident of the United States, and it ended with McKinley'sdeath on September 14, 1901.

• March 4 - Thefirst inauguration of William McKinley takes place.
• April 23 - TheAtoka Agreement is signed.
• July 24 - McKinley signs theDingley Act into law.
• December 6 - McKinley delivers the1897 State of the Union Address.^[1]
• December 16 - McKinley nominatesAttorney GeneralJoseph McKenna to theSupreme Court of the United States.

• January 21 - Attorney General Joseph McKenna is confirmed as anAssociate Justice of the Supreme Court.Governor of New JerseyJohn W. Griggs replaces him as Attorney General.
• February 15 - TheUSSMaine explodes inHavana Harbor. At the time it was falsely believed thatSpain was responsible.
• April 20 - McKinley signs theTeller Amendment, recognizing the terms under which the United States will go to war with Spain.
• April 21 -Postmaster GeneralJames Albert Gary resigns. He is replaced byCharles Emory Smith.
• April 21 - The United States blockades the ports of Cuba against Spain, beginning theSpanish–American War.
• April 25 - The United States officially declares war on Spain, stating that a state of war began on April 21.
• April 25 -Secretary of StateJohn Sherman resigns for health reasons. He is replaced byAssistant Secretary of StateWilliam R. Day
• May 1 - The United States winsBattle of Manila Bay off the coast of thePhilippines.
• May 12 - The United Statesbombards San Juan.
• June 10 - The United States wins theBattle of Guantánamo Bay and capturesGuantánamo Bay.
• June 13 - McKinley signs theWar Revenue Act of 1898 into law.
• June 21 - The United Statescaptures the territory ofGuam from Spain.
• June 24 - The United States wins theBattle of Las Guasimas.
• June 28 - McKinley signs theCurtis Act of 1898 into law.
• June 30 - Spain wins theBattle of Tayacoba and theFirst Battle of Manzanillo.
• July 1 - McKinley signs theBankruptcy Act of 1898 into law.
• July 1 - The United States wins theBattle of San Juan Hill.
• July 3 - The United States wins theBattle of Santiago de Cuba and theSiege of Santiago begins.
• July 7 - The United States annexesHawaii.
• July 17 - The United States wins the Siege of Santiago and takes control of Cuba.
• July 18 - The United States wins theThird Battle of Manzanillo.
• July 25 - The United States invadesPuerto Rico.
• August 13 - The United States captures thePhilippines andPuerto Rico. Hostilities of the Spanish–American War end.
• September 16 - Secretary of State William R. Day resigns. He is replaced byJohn Hay.
• October 5 - TheChippewa defeat American forces at theBattle of Sugar Point.
• December 5 - McKinley delivers the1898 State of the Union Address.^[2]
• December 10 - The Spanish–American War officially ends with the signing of theTreaty of Paris.
• December 23 - Guam is transferred to the authority of theUnited States Navy.

• January 17 - The United States annexesWake Island.
• February 4 - ThePhilippine–American War begins.
• February 5 - The United States wins theBattle of Manila.
• February 19 -United States Secretary of the Interior Secretary of the InteriorCornelius Newton Bliss resigns.^[3] He is replaced byEthan A. Hitchcock
• February 24 - The United States wins theSecond Battle of Caloocan.
• March 24 -George Dewey becomes the onlyAdmiral of the Navy in American history.
• June 13 - The United States wins theBattle of Zapote River.
• September 6 - Secretary of State John Hay establishes theOpen Door Policy.
• August 1 -United States Secretary of War Secretary of WarRussell A. Alger is asked to resign by President McKinley. He is replaced byElihu Root.
• November 11 - ThePadre Canyon incident occurs.
• November 21 - Vice PresidentGarret Hobart dies of heart failure at the age of 55.
• December 2 - TheBattle of Tirad Pass ends inconclusively.
• December 5 - McKinley delivers the1899 State of the Union Address.^[4]

• January 8 - McKinley transfers control ofAlaska to the military.
• February 5 - The United States and the United Kingdom negotiate the construction of aNicaragua Canal.
• March 5 - Two American cruisers are deployed to Central America amid a dispute betweenCosta Rica andNicaragua.
• March 14 - McKinley signs theGold Standard Act into law, implementing thegold standard.
• April 12 - McKinley signs theForaker Act into law.
• April 30 - Hawaii is incorporated as a U.S. territory.
• July 12 - McKinley accepts the Republican presidential nomination.^[5]
• November 6 - McKinley is elected to a second term in the1900 United States presidential election, defeatingWilliam Jennings Bryan for a second time.
• December 3 - McKinley delivers the1900 State of the Union Address.^[6]

• March 2 - McKinley signs thePlatt Amendment into law.
• March 4 - Thesecond inauguration of William McKinley takes place.
• March 29 - Attorney General John W. Griggs resigns to work at thePermanent Court of Arbitration. He is replaced byPhilander C. Knox.
• September 6 - McKinley is shot byLeon Czolgosz at thePan-American Exposition.
• September 14 - McKinley dies following an infection of his injury at the age of 58. Vice PresidentTheodore Roosevelt isinaugurated as the 26th President of the United States.

• Timeline of the Theodore Roosevelt presidency, for his successor

• 1897 in the United States
• 1898 in the United States
• 1899 in the United States
• 1900 in the United States
• 1901 in the United States
• United States presidency timelines
• Presidency of William McKinley

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