Krefting is a surname. Notable people with the surname include:
Anna Krefting (1683-1766), Norwegian businesswoman Herman Krefting (1592-1651), Norwegian ironworks pioneer Kristian Krefting (1891-1964), Norwegian footballer, military officer, chemical engineer and company owner Rudolf Krefting (1860-1942), Norwegian dermatologist Ruth Krefting (1900-1987), Norwegian painter and playwright