Sannia may refer to:

• Gustavo Sannia Italian mathematician
• Marisa Sannia Italian singer

• Westmount Mall
• Westmount, Nova Scotia
• Westmount (provincial electoral district)
• Westmount Rugby Club
• Westmount-Saint-Georges
• Westmount-Saint-Louis
• Westmount, Saskatoon
• Westmount, Saskatoon, Saskatchewan
• Westmount Square
• Westmount–Saint-Louis
• Westmount—Saint-Louis (provincial electoral district)
• Westmount—Ville-Marie (electoral district)
• West Mullan, Idaho
• West Muskingum High School
• West (name)
• West Nanjing Road station
• West Nashville
• Westnet Rail
• West Newcastle
• West Newcastle, New South Wales
• West New Georgia languages
• West New Guinea gulden
• West New Guinea rupiah
• West Newington (constituency)
• West Newington (UK Parliament constituency)