Sybil Ludington (or Sibbell), April 5, 1761 – February 26, 1839, was a heroine of the American Revolutionary War. On April 26, 1777, the 16 year-old daughter of a colonel in the Colonial militia, Henry Ludington, made an all-night horseback ride to alert militia forces in the neighboring towns of what is today's Putnam County, New York of the burning of Danbury, Connecticut by British forces.

Her story was first published in 1880 by local historian Martha Lamb. Her book has the earliest known reference to Ludington's ride. A later reference appeared in an account of her father's life published in 1907. Because of the lack of contemporary accounts, one prominent historian has questioned whether these events occurred.Contemporaneous sources suggest that the patriot army and the town of Danbury, Connecticut, were already aware of the approaching British troops, as noted in The New-York Gazette and the Weekly Mercury, May 19, 1777, which stated, "On Saturday, the 26th of April, express came to Danbury from Brigadier General Silliman, advising that a large body of enemy had landed the day before at sun set, at Compo, a point of land between Fairfield and Norwalk, and were marching toward Danbury. Measures were immediately taken."

Ludington has been widely celebrated since around 1900. Memorial statues honor her, and books have been written about her. She was honored on a United States Bicentennial postage stamp that was released on March 25, 1975, which depicts her on her horse.