The Battle of New Orleans significantly contributed to the decline of the Federalist Party.

The Federalists had opposed the War of 1812, viewing it as unnecessary and detrimental to the nation’s interests. Their negative stance became increasingly unpopular after the stunning American victory at New Orleans on January 8, 1815, which boosted national pride and support for the war effort. The Federalists' lack of enthusiasm for the war made them appear unpatriotic in the eyes of many Americans, leading to a loss of support. Additionally, the party's decision to hold the Hartford Convention in late 1814, where they discussed grievances and potential secession, further alienated them from the public. Following the war and Jackson's victory, the Federalist Party struggled to regain influence, ultimately leading to its decline and paving the way for the rise of the Democratic Party.