Many scholars have stressed that regional dynamics led to the outbreak of the Musin Rebellion, the largest rebellion in eighteenth-century Korea. Scholars have examined the economic and political situation leading up to the violence and concluded that political marginalization caused Kyŏngsang Province elites (from the Southerner faction) to launch the rebellion. This paper analyses evidence from official sources about rebel motivations, rebel geographical associations and the court view of the causes. Although post-rebellion government statements acknowledge tensions between the court and many Kyŏngsang Province elites, rebel testimony showed no evidence of any anger about discrimination against elites from a single region. There is also inconsistent evidence of regional concerns in the membership of the rebel organization, which was drawn from three southern provinces and mainly concentrated around the capital. My findings challenge the conclusions of regionalist scholars and place the Musin Rebellion in a trajectory of late Chosŏn rebellion that was attempting to redress factional political discrimination and was not caused by regional concerns.