Circular line may refer to:

• Circular line (Taipei), an elevated, medium-capacity rapid transit in Taipei and New Taipei City, Taiwan, currently under construction with the first section scheduled to open in 2015
• Circular light rail, a 22.1-kilometer (13.7 mi) circular light rail line currently under construction in Kaohsiung, Taiwan

• Committee for the Prevention of Vice and the Promotion of Virtue
• Committee for the Promotion of Culture Among the Jews of Russia
• Committee for the Promotion of Culture Among the Russian Jews
• Committee for the Propagation of Virtue and the Elimination of Sin
• Committee for the Propagation of Virtue and the Prevention of Vice
• Committee for the Protection of Human Rights
• Committee for the relief of the black poor
• Committee for the scientific examination of religion
• Committee for the Third International
• Committee for the Western Wall
• Committee for Viticultural Action
• Committee hearing
• Committee in defense of peace and the geneva agreements
• Committee in Defense of Peace and the Geneva Agreements
• Committee in solidarity with the people of el salvador
• Committeemen and Committeewomen (Chicago)
• Committeemen and Committeewomen (Cook County, Illinois)
• Committee of 100
• Committee of 100 (disambiguation)
• Committee of 100 (Finland)
• Committee of 100 on the Federal City
• Committee of 200
• Committee of 24
• Committee of 300
• Committee of 70