This is a listing of outfits worn by America in Hetalia: Axis Powers. Changes made to them in other adaptations, such as the anime, are noted where applicable.
America's military attire is designed based on a US Air Force airman's uniform. He wears a tan jacket and pants, with a white dress shirt and brown tie worn underneath. He also wears a brown bomber jacket (sometimes shown with a "50" on the back), and black shoes.
But in earlier artwork, America was depicted as wearing black boots with large white cuffs, and had his pants tucked into them. The reason for this change is of Himaruya learning that 'American people prefer to wear their pants over their shoes'.
He was wearing a simple white dress shirt, a mahogany tie, tan blazer jacket, and tan trousers.
He appears this way in Academy Hetalia Christmas as well.
In :) In The World, America wore his bomber jacket over a white turtleneck and tan pants. Though he did not wear this outfit in the anime version, it appeared in an illustration in the 2010 Hetalia calendar as an "easter egg" (or perhaps homage) to the original story.
These are all the outfits that America has worn. Please note that this list is incomplete. Please click for larger viewing.