Constitution Party, Constitutional Party, or Constitutionalist Party may refer to one of several political parties.

• Progressive Party (China) or Constitutionalist Party, a political party in the Republic of China
• Constitution Party (Egypt)
• Constitution Party (Estonia)
• National Constitution Party, a political party in Hungary
• Democratic Party (Indonesia), a political party now-represented in lower chamber
• Constitutionalist Party of Iran, a now-banned Iranian political party
• Constitutional Party (Spain)
• Constitution Party (United States)
  • American Constitution Party (Colorado)
  • Constitution Party of Oregon
• Constitutional Party (Uruguay)

• Constitutional Party (Austria)
• Constitutional Party (Costa Rica)
• Constitution Party (United States, 1952), a former party in the United States
• Constitutional Party (Malta)
• Constitutional Party (Peru)
• Constitutionalist Party (South Africa), see 1910 South African Senate election

• Kenseitō or Constitutional Party, a political party in Japan
• Kenseikai or Constitutional Association, a political party in Japan
• Junimea, a Romanian movement briefly active as the Constitutional Party

• Constitutional Bloc (disambiguation)
• Constitutional Democratic Party, a political party in the Russian Empire
• Constitutional Democratic Party (disambiguation)
• Constitutional Union Party (disambiguation)
• Constitutionalism, a political ideology marked by adherence to a constitution
• Constitutionalist Liberal Party, a political party in Nicaragua
• Destour or the Constitutional Liberal Party, a political party in Tunisia
• Kensei Hontō or Constitutional Main Party, a political party in Japan
• New Constitution Party of Canada, an unregistered party in Canada
• Progressive Constitutionalist Party (Malta)
• Progressive Constitutionalist Party (Mexico)
• Rikken Dōshikai or Constitutional Association of Allies, a political party in Japan
• Rikken Kaishintō or Constitutional Reform Party, a political party in Japan
• Rikken Kokumintō or Constitutional Nationalist Party, a political party in Japan
• Rikken Minseitō or Constitutional Democratic Party, a political party in Japan
• Rikken Seiyūkai or Constitutional Association of Political Friendship, a political party in Japan
• Rikken Teiseitō or Constitutional Imperial Rule Party, a political party in Japan
• Zhi Xian Party (Constitution-Foremost Party of China), a political party in the People's Republic of China