thumb|A [[landing craft utility returns to USS Belleau Wood with members of the 11th Marine Expeditionary Unit]]
A Marine Expeditionary Unit (MEU, pronounced as one syllable "" IPA: ) is the smallest form of Marine Air–Ground Task Force (MAGTF) in the United States Fleet Marine Force. Each MEU is an expeditionary rapid reaction force ready to answer any crisis, whether it be disaster aid or a combat mission.
{| class="wikitable" width="600" style="text-align:center;"
|- bgcolor="#CCCCCC"
!Official Name || Insignia || Headquarters
|-
|11th Marine Expeditionary Unit || 75px || Marine Corps Base Camp Pendleton, California
|-
|13th Marine Expeditionary Unit || 75px || Marine Corps Base Camp Pendleton, California
|-
| 15th Marine Expeditionary Unit || 75px || Marine Corps Base Camp Pendleton, California
|}
East Coast MEUs
East Coast MEUs fall under II Marine Expeditionary Force and maintain presence in the Atlantic Ocean and Mediterranean Sea.