Razor clam is a common name for long, narrow, saltwater clams (which resemble a closed straight razor in shape), including:
- Atlantic jackknife clam, Ensis directus
- Gould's razor shell, Solen strictus
- Pacific razor clam, Siliqua patula
- Pinna bicolor, a species of large saltwater clam in the family Pinnidae
- Razor shell, Ensis arcuatus
- Rosy razor clam, Solecurtus strigilatus
- Siliqua alta, the northern or Arctic razor clam
- Siliqua costata, Atlantic razor clam
- Solen marginatus, the grooved razor shell