Saint Regina may refer to:

• Saint Regina (martyr), 3rd century French martyr and saint of the Catholic Church
• Diocese of Saint Regina, former name of the Roman Catholic Archdiocese of Regina, Saskatchewan, Canada

• 21075 Heussinger
• 21076 Kokoschka
• 2107 BC
• 2107 Ilmari
• 21082 Araimasaru
• (21083) 1991 TH₁₄
• 21087 Petsimpallas
• 21089 Mochizuki
• 2108 Otto Schmidt
• 21093 (ZIP code)
• 2109 Dhotel
• 210BC
• 210 H 17
• 2/10 Marines
• 2(10)-pinene
• 210 Squadron (Israel)
• 210 Street-Williamsbridge (IRT Third Avenue Line)
• 2/10th Australian Infantry Battalion
• 2/10th Battalion (Australia)
• 210th Coastal Division (Italy)
• 2/10th Commando Squadron (Australia)
• 210th Field Artillery Brigade
• 210th Fires Brigade
• 210th (Frontiersmen) Battalion, CEF
• 210th Rescue Squadron