| Derek Wayne Armstrong | |
| State Assembly: | Nevada |
| District: | 21st |
| Term Start: | November 5, 2014 |
| Term End: | November 9, 2016 |
| Predecessor: | Andy Eisen |
| Successor: | Ozzie Fumo |
| Birth Date: | 17 August 1980 |
| Birth Place: | Las Vegas, Nevada, Nevada, U.S. |
| Party: | Republican |
| Residence: | Las Vegas, Nevada, U.S. |
| Alma Mater: | University of Nevada, Las Vegas |
| Profession: | Lawyer and Accountant |
Derek W. Armstrong (born August 17, 1980) is an American Republican politician and a former member of the Nevada Assembly representing District 21. He won the 2014 Republican primary against Andrew Coates.[1] Armstrong defeated incumbent Andy Eisen.[2] [3] He lost reelection in 2016.
Armstrong is a lawyer and veteran of the United States Marine Corps.[4]