Edcel Castelar Lagman Sr. is a Filipino human rights lawyer and politician from the province of Albay. He was elected as a member of the House in 1987 to 1998 and 2004 to 2013 and 2016 up to the present. He served as Minority Floor Leader of the House of Representatives of the Philippines until 2012, when he resigned the office. Lagman is one of the key Liberal Party figures in the House of Representatives, having supported the Responsible Parenthood and Reproductive Health Act, the SOGIE Equality Bill, the Free Tertiary Education Act, the Anti-Dynasty Bill, and the Freedom of Information Bill. He is also the principal author of the Divorce Bill, the Human Rights Defenders Bill, the Prevention of Teenage Pregnancy Bill, and the Anti-Child Marriage Bill.

Albay, officially the Province of Albay, is a province in the Bicol Region of the Philippines, mostly on the southeastern part of the island of Luzon. Its capital is the city of Legazpi, the regional center of the whole Bicol Region, which is located in the southern foothill of Mayon Volcano.