| Unit Name: | Marine Aviation Logistics Squadron 49 |
| Dates: | 1 July 1969 – present |
| Country: | United States |
| Allegiance: | United States of America |
| Branch: | United States Marine Corps |
| Type: | Logistics |
| Role: | Aviation logistics support |
| Command Structure: | Marine Aircraft Group 49 4th Marine Aircraft Wing |
| Garrison: | Stewart Air National Guard Base |
| Nickname: | "Magicians" |
| Motto: | Gratis Non Est Sufficere |
| Battles: | Operation Desert Storm Operation Iraqi Freedom Operation Enduring Freedom |
| Commander1: | LtCol Jeff Dean |
| Commander1 Label: | Commanding Officer |
Marine Aviation Logistics Squadron 49 (MALS-49) is a reserve aviation logistics support unit of the United States Marine Corps. They are currently based at Stewart Air National Guard Base in Newburgh, New York and fall under the command of Marine Aircraft Group 49 (MAG-49) and the 4th Marine Aircraft Wing (4th MAW). The squadron 49 is the only MALS in the 4th MAW with an active duty core of maintenance and aviation supply personnel. MALS-49 is currently structured with six separate and distinct divisions of maintenance, supporting three separate and distinct sites, along with five flying squadrons.
MALS-49 was activated on 1 July 1969 at Naval Air Station New York in Brooklyn, New York as Headquarters and Maintenance Squadron 49 (H&MS-49). The H&MS unit was relocated to Naval Air Station Lakehurst, New Jersey in 1970 and moved again to Naval Air Station Willow Grove, Pennsylvania in 1972.
In 1988, the unit was redesignated as Marine Aviation Logistics Squadron 49 with the headquarters located at NAS Willow Grove. During 1988 detachments were established at Andrews Air Force Base, Washington DC and Naval Air Station South Weymouth, Massachusetts. In 1992, the Marine Aviation Logistics Squadron 42 (MALS-42) detachment located at Stewart ANGB, Newburgh, New York was redesignated as a detachment of MALS-49, bringing the number of sites supported by MALS-49 to four. In February 1994 the MALS-49 flag was relocated from NAS Willow Groove to Stewart ANGB
In 2004, the unit activated reserve Marines in support of Operation Iraqi Freedom to serve as augmentees for MALS-16 when they deployed to Iraq.