Teodoro Manguiat Kalaw (March 31, 1884 – December 4, 1940) was a Filipino scholar, legislator, and historian in spanish language.

While pursuing law, Kalaw became a writer for El Renacimiento, along with Rafael Palma and Fernando Ma.

In October 1908, Interior Secretary Dean C. Worcester filed a libel suit against the paper for their editorial entitled "Aves de Rapiña" ("Birds of Prey").

During his term, he sponsored bills supporting internal migration and agricultural development and maintenance of public schools through municipal taxation.

[7] Kalaw was a member of the Academy of Political Science, American Social and Political Science; Sociedad Americana de Derecho Internacional; Real Academia Hispano Americano de Ciencias y Artes, of whose Philippine Section he became president in 1925; Associacion Hispano-Filipina, and the Philippine Library Association.

Their son, Teodoro Kalaw Jr., became a prominent businessman and was married to Philippine senator Eva Estrada.