William Lathrop can refer to:

• William Lathrop (1825-1907), a U.S. Representative from Illinois.
• William Langson Lathrop (1859–1938), an American landscape painter
• Bill Lathrop (1891–1958), American baseball pitcher

• Atlantic Wharf
• Atlantic white cedar
• Atlantic White Cypress
• Atlantic white cypress
• Atlantic White Shrimp
• Atlantic White-Sided Dolphin
• Atlantic white-sided dolphin
• Atlantic wolffish
• Atlantic Women's Colleges Conference
• Atlantic wreckfish
• Atlantic–Congo languages
• Atlantida department
• Atlantida Department
• Atlantida (novel)
• Atlantides
• Atlantikwall
• Atlantique
• Atlantis
• Atlantis (1913 film)
• Atlantis-2
• Atlantis Airlines
• Atlantis (album)
• Atlantis Armenian Airlines
• Atlantis Attacks
• Atlantis auxilary cruiser