- Temple
- Trenton
- Troy
- Thomaston
- Topsfield
- Turner
- Toms Island
- Tack Island
- Tacoma
- Tainter Corner
- Talbot Island
- Tallwood
- Tarbox Island
- Tarratine
- Tatnic
- Tattle Corner
- Taylor Island
- Tea Kettle Corner
- Teachers Island
- Teakettle Island
- Teasdale Island
- Teel Island
- Temple Heights
- Temple Intervale
- Ten Cent Island
- Ten Degree
- Tenants Harbor
- Tenpound Island
- Tenpound Island
- The Ark