| Nancy Lewis | |
| Birth Place: | United States |
| Firstproshow: | IFBB Ms. International |
| Firstproshowyear: | 1992 |
| Bestwin: | IFBB Jan Tana Pro Classic middleweight and overall champion |
| Bestwinyear: | 2002 |
| Predecessor: | Gayle Moher Fannie Barrios |
| Successor: | Helle Trevino Dayana Cadeau |
| Yesorretiredyear: | Since 1985 |
Nancy Lewis is a professional female bodybuilder from the United States. She earned her pro card by winning the overall title at the 1991 NPC USA Championship. She competed in a number of professional contests from 1992 to 1998 with a series of solid placings, but no titles. Then after a four-year retirement, she returned to competition in 2002, winning the overall title at the Jan Tana Classic.