Alliant

Alliant may refer to:
 * Alliant Aviation, an American aircraft manufacturer based in Three Rivers, Michigan and later in Richland, Michigan
 * Alliant Destiny Fusion, an American powered parachute design
 * Alliant Destiny XLT, an American powered parachute design
 * Alliant Computer Systems, an American computer company that designed and manufactured parallel computing systems
 * Alliant Credit Union, a Chicago-based financial cooperative
 * Alliant Energy, an American public utility holding company that incorporated in Madison, Wisconsin in 1981
 * Alliant Energy Center, an American multi-building complex in Madison, Wisconsin
 * Alliant Exchange, Inc, an American food service company
 * Alliantgroup, an American tax consulting services firm based in Houston, Texas
 * Alliant International University an American private, higher education institution based in San Diego, California
 * Alliant Techsystems, an American aerospace, defense, and sporting goods company based in Arlington County, Virginia
 * Alliant RQ-6 Outrider, an American unmanned aerial vehicle