There are no towns halfway between a single place.
halfway point between portsmouth nh and palm beach fl
Lavonia, Georgia, is halfway between those two towns.
Roseau and Portsmouth
Edinburgh to Maidstone is 420 miles, so halfway would be somewhere around Leeds.
Parkton, MD
Assuming you mean what town is halfway between Denver and Galveston. A small town named Childress is halfway, but the closest larger towns are Amarillo or Wichita Falls
There aren't many towns on that whole stretch of I-5. Wasco is the closest to halfway.
Harrisonburg and Staunton, Virginia
Longview TX or Marshall TX
New England, ND
No! ofcourse not! They are two different towns altogether!
Philadelphia is the city that is halfway between Washington DC and Boston MA. New York and Baltimore are the other towns that are in between.