1846 in the United States

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← 1845 1844 1843 1846 in the United States → 1847 1848 1849
Decades:	1820s 1830s 1840s 1850s 1860s
See also:	History of the United States (1789–1849) Timeline of United States history (1820–1859) List of years in the United States

Events from the year 1846 in the United States. In this year, the United States declares war on Mexico, starting the Mexican–American War.