- Mar 1 E. Remington and Sons in Ilion, New York begins production of the first practical typewriter
- Mar 3 US Congress & government retroactively raise own salaries
- Mar 3 US Congress authorizes federal departmental postage stamps
- Mar 3 US Congress enacts the Comstock Law, making it illegal to send any "obscene, lewd, or lascivious" books through the mail
- Mar 22 Slavery is abolished in Puerto Rico, celebrated as Emancipation Day
- Mar 27 35th Grand National: J. M. Richardson wins aboard 20/1 shot Disturbance by 6 lengths from Rhyshworth
- Mar 29 English FA Cup Final, Lillie Bridge, London: Wanderers beat Oxford University, 2-0; second consecutive title
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