Sagamiensis may refer to:
- Algicola sagamiensis, species of bacteria
- Diaphus sagamiensis, species of lanternfish
- Hypselodoris sagamiensis, species of sea slug
- Lobiger sagamiensis, species of sea snail
- Microdrillia sagamiensis, species of sea snail
- Micromonospora sagamiensis, species of bacteria
- Microsveltia sagamiensis, species of sea snail
- Omphalomargarites sagamiensis, species of sea snail
- Plectranthias sagamiensis, species of fish
- Showajidaia sagamiensis, species of sea slug
- Thyca sagamiensis, species of sea snail