Texas This category is for articles and events specifically related to the year 1821 in Arkansas Territory. 18161817181818191820182118221823182418251826 1770s1780s1790s1800s1810s1820s1830s1840s1850s1860s1870s Subcategories This category has the following 2 subcategories, out of 2 total. / 1821 establishments in Arkansas Territory (2 P)E 1821 Arkansas elections (1 P)