{{Infobox official post
| post = Menteri Pertahanan Amerika Serikat
| flag = Flag of the United States Secretary of Defense.svg
| flagsize = 120px
| flagcaption = Bendera Menteri Pertahanan
| insignia = Seal of the United States Department of Defense (1949–2022).svg
| insigniasize = 110px
| insigniacaption = Lambang Departemen Pertahanan
| incumbentsince = 27 Februari 2013
| image = Chuck Hagel Defense portrait.jpg
| imagesize = 200px
| incumbent = [[Chuck Hagel]]
| style = ''Mister Secretary''
| member_of = [[Kabinet Amerika Serikat|Kabinet]]<br>[[Dewan Keamanan Nasional Amerika Serikat|Dewan Keamanan Nasional]]
| department = [[Departemen Pertahanan Amerika Serikat|Departemen Pertahanan]]<br>[[Kantor Menteri Pertahanan|OSD]]
| reports_to = [[Presiden Amerika Serikat|Presiden]]
| seat = [[The Pentagon]], [[Arlington County, Virginia|Arlington County]], [[Virginia]]
| appointer = [[Presiden Amerika Serikat|Presiden]]
| appointer_qualified = atas [[saran dan persetujuan]] [[Senat Amerika Serikat|Senat]]
| termlength = Tidak dibatasi
| constituting_instrument = {{UnitedStatesCode|10|113}}<br>{{UnitedStatesCode|50|401}}
| precursor = [[Menteri Perang Amerika Serikat|Menteri Perang]]<br>dan [[Menteri Angkatan Laut Amerika Serikat|Menteri Angkatan Laut]]
| formation = 19 September 1947
| inaugural = [[James Forrestal]]
| succession = Keenam<br><small>dalam [[urutan suksesi kepresidenan Amerika Serikat|urutan suksesi kepresidenan]]</small>
| deputy = [[Wakil Menteri Pertahanan Amerika Serikat|Wakil Menteri Pertahanan]]<br><small>(wakil utama)</small><br>[[Ketua Kepala Staf Gabungan]]<br><small>(wakil militer)</small>
| salary = [[Executive Schedule|Executive Schedule, level 1]]
| website = [http://www.defense.gov/ www.defense.gov]
}}
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