Steinitz's theorem may refer to any of the following results by German mathematician Ernst Steinitz (1871–1928):

• Steinitz's theorem on the graphs of three-dimensional convex polyhedra
• Steinitz exchange lemma on bases of finite-dimensional vector spaces
• Lévy–Steinitz theorem on the convergence of rearranged infinite series of vectors
• Several variations of Carathéodory's theorem (convex hull) on the enclosure of points in the convex hulls of other points
• Steinitz's theorem (field theory) on simple extensions

This disambiguation page lists articles associated with the title Steinitz's theorem.
If an internal link led you here, you may wish to change the link to point directly to the intended article.