The Aberdeen IronBirds are a Minor League Baseball team based in the city of Aberdeen in Harford County, Maryland. They are the High-A affiliate of the Baltimore Orioles and compete in the South Atlantic League. They were previously members of the New York–Penn League from 1977 to 2020, and of the High-A East in 2021. In conjunction with Major League Baseball's restructuring of Minor League Baseball in 2021, the IronBirds were organized into the 12-team High-A East.