January 1, 1828
1828 military revolt in Brazil by Irish and German mercenaries
1828 United States presidential election — 11th quadrennial U.S. presidential election
Burke and Hare murders — series of murders committed in Edinburgh, Scotland in 1828
Treaty between Mexico and the United States
Treaty of Turkmenchay — agreement between Qajar Iran and Imperial Russia that concluded the Russo-Persian War of 1826–28
August 1828 treaty to recognize the independence of Uruguay
1828 Gran Columbia-Peru War naval battle