Summerside

• Summer Side of Life, studio album

;Canada

• Summerside, Edmonton, a neighbourhood in Edmonton, Alberta
• Irishtown-Summerside, a town in Newfoundland and Labrador
• Summerside, Prince Edward Island, a city in Prince Edward Island

;United States

• Summerside, Ohio, census-designated place in Ohio

• CFB Summerside, former Canadian air force base
• {{HMCS|Summerside|K141}} (I), a Royal Canadian Navy vessel that served during the Battle of the Atlantic
• {{HMCS|Summerside|MM 711}} (II), a Canadian Forces vessel commissioned in 1999

• Summerside Storm
• Summerside Western Capitals

• Summerside Airport, airport in Summerside, Prince Edward Island

• Springside (disambiguation)

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