U239 or U-239 may be:
- German submarine U-239, a German U-boat of World War II
- Uranium-239 (U-239 or 239U), an isotope of uranium
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
If an internal link led you here, you may wish to change the link to point directly to the intended article.
If an internal link led you here, you may wish to change the link to point directly to the intended article.