Postbellum (Latin for 'after the war') may refer to:

• Any post-war period or era
• Post-war period following the American Civil War (1861–1865); nearly synonymous to Reconstruction era (1863–1877)
• Post-war period in Peru following its defeat at the War of the Pacific (1879–1883). Usually known by its Spanish name posguerra.
• Jus post bellum in Just War Theory
• Post Bellum, a Czech non-profit

• All pages with titles containing post bellum
• All pages with titles containing postbellum
• Antebellum (disambiguation)
• Interbellum
• Pre-war (disambiguation)
• Bellum (disambiguation)