This article summarizes nuclear reactor designs that are either available or anticipated to become available in the United States by 2030. Criteria for including reactors are: 1) participation or likely participation in the U.S. Nuclear Regulatory Commission's design certification or pre-certification programs; and 2) inclusion under the Generation IV International Forum (GIF) program for longer-term reactor development. The U.S. Department of Energy is among the sponsors of the GIF program. While no detailed technical description of particular reactor designs is included, such descriptions and schematics are available elsewhere and, when practical, some of these are hyperlinked in the text. Reactor vendors who put forward new designs anticipate that their designs will meet commercial market needs including design safety and affordable, competitive construction costs while maintaining the usually low operating costs of today’s commercial nuclear reactors. This paper does not assess such views, though a section does identify public discussion of efforts within the nuclear industry and the U.S. government to improve the industry's competitive position.