Marcial Calleja y Casitas (August 22, 1863 – May 5, 1914) was a Filipino lawyer who was elected as one of the representatives of Albay to the Malolos Congress.

He studied in the Seminary of Nueva Caceres for his segunda enseñanza (secondary education), and later on took a course in philosophy from the same institution.

Soon after receiving his title in surveying, Calleja was appointed perito tasador del estado (state assessor) and was assigned in Laguna until 1891, when he was chosen as secretario de ayuntamiento (city council secretary) through a competitive test.

In 1909, Calleja was back in Albay conducting review classes for students taking the bar examinations.

In the same year, he was elected assemblyman of the first district of Albay in the Second Philippine Assembly, where he participated in the passage of many significant municipal and provincial codes.