Semper
- California
- Carl Semper
- Civil Air Patrol
- Colin Semper
- Ea Semper
- Federal Emergency Management Agency
- Georg Semper
- Gottfried Semper
- Hero Group
- Ignatius of Loyola
- Israel Defense Forces
- Johannes Semper
- John Semper
- List of Latin phrases (S)
- Natalya Yevgenevna Semper
- National Security Agency
- San Diego
- Seal of West Virginia
- Semper Gumby
- Semper I
- Semper Supra (march)
- Semper fi (disambiguation)
- Semper fidelis
- Semper fidelis (disambiguation)
- Semper paratus
- Semper supra
- Semperoper
- Sic semper tyrannis
- Trevor Semper
- United States
- United States Armed Forces
- United States Coast Guard
- United States Marine Corps
- United States Navy
- United States Public Health Service
- United States Space Force