Mississippi's statehood, granted in December 1817, was a culmination of evolving demographic and political trends in the early 19th century United States. Following the American Revolution and the subsequent westward expansion, territories such as Mississippi found themselves with growing populations due to migration and settlement. The region's fertile land attracted many, especially those involved in agriculture. Mississippi's preparation for statehood involved creating a comprehensive constitution, which was drafted by a statewide convention in its capital, Jackson.

The admission process was marked by both celebration and a sense of purpose. Delegates came together to ensure that the rights of the citizens were protected through their new governance structure. The constitution outlined the framework for legislative and executive powers and established a judicial system, marking a significant step towards a more organized political structure. Mississippi's admission to the Union was backed by support from various political factions, including the Democratic-Republican Party, which was dominant at the time.

With the approval of Congress and President James Monroe, Mississippi officially transformed from a territory into a full-fledged state, joining the Union as the 20th state in December 1817. This change heralded a new era for Mississippi residents, fostering hopes of economic growth, political representation, and enhanced civil rights within the framework laid out by their constitution. The state's status allowed it to participate actively in national politics, influencing decisions that would shape the southern United States in the coming decades.