Reconstructionism may refer to:

• Christian Reconstructionism, a Calvinistic theological-political movement
• Hellenic Polytheistic Reconstructionism, a revival of ancient Greek religion
• Polytheistic reconstructionism, an approach to modern paganism
• Reconstructionist Judaism, a modern American-based Jewish movement
• Zalmoxianism, a rebirth of ancient Dacian religion

• Reconstruction (disambiguation)
  • Reconstruction era, a period in American history following the American Civil War
• Reconstructivism
• The Reconstructionist, a magazine