The foundation of a state’s overall security is political security, which entails a comprehensive set of measures aimed at safeguarding sovereignty, territorial integrity, political independence, and constitutional order. The political sector refers to the domain of security that focuses on protecting the state’s political system, encompassing its governance mechanisms, democratic processes, rule of law, and institutional frameworks. These elements ensure stability and functionality while fostering resilience against threats that could destabilise them. The nature of these threats can be categorised into domestic and external dimensions. Domestic threats include political instability caused by weaknesses in the political party system, interference with judicial independence, erosion of media freedom, and the lack of integration or protection of minority rights. External threats include hybrid warfare tactics like cyber-attacks, propaganda, economic coercion, and foreign influence operations aimed at destabilising domestic politics. Geopolitical pressures, including energy dependency and economic manipulation, further exacerbate these vulnerabilities. The Baltic States—Lithuania, Latvia, and Estonia—have experienced significant vulnerability in the political security sector for more than three decades, following their re-establishment of independence in 1990 and 1991. This vulnerability is shaped by their geographical location, historical experiences, and their often-tense relationships with Russia and Belarus. This chapter provides a thorough analysis of the systemic resilience of the Baltic States to both domestic threats, including weaknesses in the political party system, judicial independence, media freedom, and minority rights, and external threats posed by actors such as Russia, China, and Belarus. It explores how the Baltic States, as consolidated democracies, have developed mechanisms to counter vulnerabilities and strengthen political security. The analysis underscores that, despite ongoing challenges, the Baltic States demonstrate notable resilience through their commitment to democratic governance and the rule of law.