
The overall count does not include former and discontinued post office locations, such as what is now the Municipal Building in Toccoa, Georgia:
I also make efforts to find and document freestanding mail processing facilities, such as the Logistics and Distribution Facility in Tampa, Florida:
I finally finished visiting every post office on Long Island, in May:

And just this past week I quit procrastinating and completed my visits to every single post office [plus carrier annex, Contract Postal Unit, and other mail processing facility] in New York City:

I visited as many as 30 post offices in one day. State by state, counting only distinct active postal locations:
New Jersey: 112 post offices
Focus/Foci: Northern New Jersey, central shore
(I have now visited more than 75% of the nearly 800 postal facilities in New Jersey.)
Massachusetts: 94
Worcester, southeast Massachusetts
Tennessee: 75
Eastern Tennessee: Bristol to Knoxville
Virginia: 68
I-81 corridor, south-central tier
North Carolina: 63
Southwest N.C., Greensboro
South Carolina: 61
Northwest S.C., southern shore to Charleston
Florida: 59
Tampa / Saint Petersburg
West Virginia: 55
Northeast panhandle, Beckley
Maryland: 54
Baltimore and D.C. suburbs
New York: 49
The South Fork of Long Island
Georgia: 46
Very southeast and northeast corners
Connecticut: 39
Hartford area
Pennsylvania: 29
District of Columbia: 16
Rhode Island: 11
Delaware: 6
The year also brought milestones 5,000 and 5,500...
#5,500: Petersburg, Virginia: Fort Lee Branch post office
Wishing you all a great 2014!