La 4th Marine Division è una divisione meccanizzata della riserva dello United States Marine Corps. Il quartier generale è situato presso Naval Air Station Joint Reserve Base New Orleans, Louisiana.
- Division Headquarters
- Headquarters Battalion
- 4th Tank Battalion, Navy and Marine Corps Reserve Center San Diego, California - Equipaggiato con 58 M-1A1, 6 M-88A1, 4 AVLB, 26 TOW
- 4th Assault Amphibian Battalion, Tampa, Florida - Equipaggiato con 230 AAV-P7A1, AAV-C7A1, AAV-R7A1
- 4th Light Armored Reconnaissance Battalion, Camp Pendleton, California - Equipaggiato con 74 LAV-25, 20 LAV-AT, 19 LAV-L, 10 LAV-M, 9 LAV-C2, 7 LAV-R
- 4th Reconnaissance Battalion, San Antonio, Texas
- 3rd Force Reconnaissance Company, Mobile, Alabama
- 4th Force Reconnaissance Company, Alameda, California
- 4th Combat Engineer Battalion, Baltimora, Maryland
- 23rd Marine Regiment, San Bruno, California
- Headquarters Battalion
- 1st Battalion/23rd Marines, Ellington Field, Texas
- 2nd Battalion/23rd Marines, Pasadena, California
- 3rd Battalion/23rd Marines, Bridgeton, Missouri
- 2nd Battalion/24th Marines, Chicago, Illinois
- Truck Company 23rd Marines, Nellis Air Force Base, Nevada
- Combat Logistics Battalion 23
- 25th Marine Regiment, Fort Devens, Massachusetts
- 14th Marine Regiment, Fort Worth, Texas