The 1804 dollar or Bowed Liberty Dollar was a dollar coin struck by the United States Mint, of which fifteen specimens are currently known to exist. Though dated 1804, none were struck in that year; all were minted in the 1830s or later. They were first created for use in special proof coin sets used as diplomatic gifts during Edmund Roberts' trips to Siam and Muscat.

Edmund Roberts was an American diplomat. Appointed by President Andrew Jackson, he served as the United States' first envoy to the Far East, and went on USS Peacock on non-resident diplomatic missions to the courts of Cochinchina, Thailand ("Siam") and Muscat and Oman during the years 1832–6.