Editing Railway Mail Service (section)

==Operating divisions – 1950==
*First Division: [[Maine]], [[Vermont]], [[New Hampshire]], [[Rhode Island]], [[Connecticut]], [[Massachusetts]].  Headquarters: [[Boston]], Massachusetts.
*Second Division: [[New York (state)|New York]], [[New Jersey]].  Headquarters: [[New York City]].
*Third Division: [[Washington, D.C.|District of Columbia]], [[Virginia]], [[West Virginia]], [[North Carolina]].  Headquarters: [[Washington, D.C.]]
*Fourth Division: [[Tennessee]], [[South Carolina]], [[Alabama]], [[Georgia (U.S. state)|Georgia]], [[Florida]].  Headquarters: [[Atlanta]].
*Fifth Division: [[Kentucky]], [[Indiana]], [[Ohio]].  Headquarters: [[Cincinnati]].
*Sixth Division: [[Illinois]], [[Iowa]].  Headquarters: [[Chicago]].
*Seventh Division: [[Missouri]], [[Kansas]].  Headquarters: [[St. Louis, Missouri]].
*Eighth Division: [[California]], [[Nevada]], [[Utah]], [[Arizona]].  Headquarters: [[San Francisco]].
*Ninth Division: [[Michigan]], also lines of [[New York Central Railroad]] between [[New York City]] and [[Chicago]].  Headquarters: [[Cleveland]].
*Tenth Division: [[North Dakota]], [[South Dakota]], [[Minnesota]], [[Wisconsin]], [[Upper Peninsula of Michigan]].  Headquarters: [[St. Paul, Minnesota]].
*Eleventh Division: [[New Mexico]], [[Texas]], [[Oklahoma]].  Headquarters: [[Fort Worth]].
*Twelfth Division: [[Arkansas]], [[Louisiana]], [[Mississippi]].  Headquarters: [[New Orleans]].
*Thirteenth Division: [[Montana]], [[Idaho]], [[Oregon]], [[Washington state|Washington]].  Headquarters: [[Seattle]].
*Fourteenth Division: [[Colorado]], [[Wyoming]], [[Nebraska]].  Headquarters: [[Omaha, Nebraska|Omaha]].
*Fifteenth Division: [[Pennsylvania]], [[Delaware]], also lines of [[Pennsylvania Railroad]] west of [[Pittsburgh]].  Headquarters: [[Pittsburgh]].

Effective August 15, 1955, the fifteen divisions of the Postal Transportation Service were eliminated and the mail routes divided among the same Postal Regions into which Post Offices were classified.