3940 Routes
- Postil Florida -> Rising Sun Wisconsin
- Postil Florida -> Wales Maine
- Poston Arizona -> Paradise Valley Arizona
- Poston Arizona -> Rock Hill New York
- Poston Arizona -> Twin Falls Arizona
- Postville Iowa -> Crystal Springs Pennsylvania
- Potato Creek South Dakota -> Elgin Tennesse
- Potato Creek South Dakota -> Thomaston Georgia
- Potawatomi State Park Wisconsin -> Crown Heights New York
- Poteau Oklahoma 74953 -> Mena Arkansas 71953
- Poteau Oklahoma -> Monegaw Springs Missouri
- Potecasi North Carolina -> Bowerston Ohio
- Poteet Texas -> Carverton Pennsylvania
- Potlatch Idaho -> Oakland Nebraska
- Potomac Beach Virginia -> Flat Rock Georgia
- Potomac Heights Maryland -> Friendship Maryland
- Potomac Heights Maryland -> Mount Auburn Illinois
- Potomac Heights Maryland -> Severn Virginia
- Potomac Illinois -> Bennington Idaho
- Potomac Illinois -> Glennie Michigan
- Potomac Maryland -> Cedar Pass South Dakota
- Potomac Maryland -> Charleston Kansas
- Potomac Maryland -> Parkers-iron Spring Arkansas
- Potomac Mills Virginia -> Breckenridge Oklahoma
- Potomac Montana -> Fairview Heights Illinois
- Potomac Montana -> Tasso Tennesse
- Potosi Missouri -> Keenesburg Colorado
- Potosi Missouri -> Munger Minnesota
- Potosi Texas -> Kensington Minnesota
- Potosi Wisconsin -> Tupelo Arkansas
- Potsdam -> Canton
- Potsdam -> Massena
- Potsdam Nueva York 13676 -> Cleveland Ohio 44113
- Potsdam Nueva York 13676 -> Greenville Maine 04441
- Potsdam Ohio -> East Rockingham North Carolina
- Potsdam Ohio -> Lake Arthur New Mexico
- Potsdam Ohio -> Noma Florida
- Potter Lake Wisconsin -> Lake Valley New Mexico
- Potter Nebraska -> Big Eddy
- Potter Nebraska -> Grooverville Georgia
- Potter New York -> Charleston Illinois
- Potter New York -> Little St. Simons Georgia
- Potter New York -> Trowbridge Illinois
- Potter Valley California -> Baker West Virginia
- Potter Valley California -> Cokato Minnesota
- Potter Valley California -> Tyrone Georgia
- Potter Wisconsin -> Solo Missouri
- Potter Wisconsin -> Williamsville New York
- Potters Fork Kentucky -> Edgerton Virginia
- Potters Fork Kentucky -> Jersey Georgia
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