|1887 in the United States|
|Years:||1884 1885 1886 – 1887 – 1888 1889 1890|
38 stars (1877–1890)
Events from the year 1887 in the United States.
- President: Grover Cleveland (Democratic)
- Vice President: vacant
- Chief Justice: Morrison Waite
- Speaker of the House of Representatives: John G. Carlisle (D-Kentucky)
- Congress: 49th (until March 4), 50th (starting March 4)
- January 20 – The United States Senate allows the Navy to lease Pearl Harbor as a naval base.
- January 28 – In a snowstorm at Fort Keogh, Montana, USA, the largest snowflakes on record are reported. They are 15 inches (38 cm) wide and 8 inches (20 cm) thick.
- February 2 – In Punxsutawney, Pennsylvania, the first Groundhog Day is observed.
- March 3 – Anne Sullivan begins teaching Helen Keller.
- March 7 – North Carolina State University is established as North Carolina College of Agriculture and Mechanic Arts.
- April 4 – Argonia, Kansas elects Susanna M. Salter as the first female mayor in the United States.
- May 14 – The cornerstone of the new Stanford University, in northern California, is laid (the college opens in 1891).
- June 28 – Minot, North Dakota is incorporated as a city.
- August – The U.S. National Institutes of Health is founded at the Marine Hospital, Staten Island, New York, as the Laboratory of Hygiene.
- Teachers College, later part of Columbia University, is founded.
- The U.S. Congress passes the Interstate Commerce Act.
- Gilded Age (1869–c. 1896)
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