ABSTRACTThis analysis explores the options for a conceptual framework to explicate the dynamics of decentralization reform in Thailand. The first section examines typological frameworks used in various social scientific fields to classify decentralization. Second, as a case in point, we analyze the decentralization reform process in Thailand, which officially began in the late 1990s. Then, the analysis examines theoretical and empirical works that attempt to explain the dynamics of decentralization in Thailand. We suggest historical institutionalism, along with the concepts of path dependence and critical junctures, as theoretical approaches to understand decentralization problems with an eye to political actors’ strategic interests, as well as political and institutional contexts that restrain their choices.