The map below shows all OT/IT Post Offices in service in 1903 (plus some that had been discontinued) and the network of mail routes over which mail passed to reach its intended recipients. Most routes started at a Post Office that was on a railroad and mail was taken from there to other Post Offices that didn't themselves have rail service. In some cases, a short route started from an outlying office to connect with existing service at a nearby one. Deliveries ranged from six times a week to major Post Offices along the Railroad to onedelivery a week to small offices in outlying areas. The map's legend shows frequency of delivery, but the original map was color coded and it is difficult to interpret frequency of delivery from the available black and white copy. The routes themselves are clear, however, and this is the information of greatest use to genealogists who are trying to find long-gone places.
Counties, Lands, and Nations on this map show territorial boundaries as they existed in 1903 and thus do not correspond to present-day counties. If you already know the general area a P.O. served, you can go straight to that segment of the map.
Page updated:
State Coordinator: Linda K. Lewis
Asst State Coordinator: Rebecca Maloney
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