Reconstructionist Judaism, a movement within Judaism that (among other views) believes Judaism to be an evolving civilization.

Zoroastrian Reconstructionism, a non-cohesive religious and academic movement to uncover supposed earlier forms of Zoroastriaism (usually focusing on a 'pre-henotheistic' form of Zoroastrianism, as is typified in groups such as Gathas-Only Zoroastrians).

Reconstruction, the period in United States history that refers to the orchestrated post-war resolution of political and economic issues in the former Confederate States of America after the American Civil War.

Christian Reconstructionism, a controversial religious and theological movement within Protestant forms of Christianity that seeks to enforce private and public (civil) enforcement and general normalization of moral commandments as interpreted from scripture into overall society.

Polytheistic Reconstructionism, a common umbrella term for various related and unrelated groups that seek to revive various polytheistic religions prior to the ascendency of monotheistic religions, usually along with supporting cultural elements which have since fallen into disuse or obscurity.