Niconnor "Nico" Alexander (born 4 February 1977 in San Fernando) is a sprinter from Trinidad and Tobago who specialized in the 100 metres.
He attended Abilene Christian University, Texas, USA and graduated with a BS in industrial technology in 2003.
| 1995 | CARIFTA Games (U20) | George Town, Cayman Islands | 3rd | relay | |
| 1998 | Central American and Caribbean Games | Maracaibo, Venezuela | 4th | relay | |
| 1999 | Pan American Games | Winnipeg, Canada | 5th | relay | |
| 2003 | Pan American Games | Santo Domingo, Dominican Republic | 8th | 100 m | |
| 2nd | relay | ||||
| 2004 | World Indoor Championships | Budapest, Hungary | 8th | 60 m | |
| Olympic Games | Athens, Greece | 7th | relay | ||
| 2007 | NACAC Championships | San Salvador, El Salvador | 3rd | relay |