T
- Tablerock
- Takoma Park
- Tall Timbers
- Tammany Manor
- Taneytown
- Tantallon
- Tanyard
- Tappers Corner
- Tasker Corners
- Taylor
- Taylors Island
- Taylorsville
- Taylorville
- Teagues Point
- Temple Hills
- Templeville
- Thayerville
- The Hill Farm
- Theodore
- The Woods of Town Point
- Thomas
- Thomas Run
- Thompson Corner
- Thompsons Corner
- Thompsontown
- Thrift
- Thurmont
- Tilghman
- Tilghman Island
- Tilghmanton
- Timberland Estates
- Timmonstown
- Timonium
- Tintop Hill
- Toddville
- Tolchester Beach
- Tompkinsville
- Topeka East
- Town Creek
- Town Point
- Towson
- Tracys Landing
- Tranquility Estates
- Trappe
- Travilah
- Trent Hall
- Trenton
- Trenton Place
- Trinity
- Troutville
- Troyer
- Truitt
- Tunis Mills
- Turf Valley
- Turn Quist
- Twiggs Corner
- Twiggtown
- Twin River Trailer Park
- Two Locks
- Tyaskin
- Tyler
- Tylerton
- Tyrone