| David Alagalak | |
| Birth Date: | April 11, 1944 |
| Birth Place: | Southampton Island, Eastern Northwest Territories, Canada |
| Residence: | Arviat |
| Office: | MLA for Arviat |
| Term Start: | 2004 |
| Term End: | 2008 |
| Predecessor: | Kevin O'Brien |
| Successor: | Daniel Shewchuk |
| Party: | non-partisan consensus government |
David Alagalak (born 11 April 1944 on Southampton Island, Nunavut) is a Canadian politician, who was the Member of the Legislative Assembly (MLA) for the electoral district of Arviat in the Legislative Assembly of Nunavut from 2004 to 2008.
Prior to becoming an MLA, Alagalak was mayor of Arviat and served as a board member to several Inuit organizations.