Lamarca or LaMarca is a surname. Notable people with the surname include:

• Anthony LaMarca, American musician
• Carla Lamarca (born 1982), Brazilian musician
• Carlos Lamarca (1937–1971), Brazilian communist
• Dolors Lamarca (born 1943), Spanish philologist
• Guillermo Lamarca (born 1949), Argentine rugby union player and coach
• Iñigo Lamarca (born 1959), Spanish lawyer
• Roberto Lamarca (1959–2017), Venezuelan actor
• Russell LaMarca, American politician
• Tania Lamarca (born 1980), Spanish rhythmic gymnast

• Preston Geren
• Preston Gomez
• Preston Griffall
• Preston Guild
• Preston Gómez
• Preston Heights
• Preston Heyman
• Preston Highlands
• Preston Highlands, Dallas
• Preston High School
• Preston High School (Bronx)
• Preston High School (New York City)
• Preston High School (Ontario)
• Preston High School (West Virginia)
• Preston H. Leslie
• Preston holder
• Preston Holder
• Preston Hollow
• Preston Hollow Elementary School
• Preston Hopkins Leslie
• Prestonia
• Prestonia amazonica
• Prestonia, Louisville
• Prestonian
• Prestonia parvifolia