Several offices have moved in recent years, but are still on maps or traffic signs in the old locations. Old and new locations given where I know. In addition, some are on wrong location in google maps (corrections submitted).
I will visit more and take pictures, finally can call the post: Pictorial guide to TAT offices in Thailand (there are some abroad as well).
Some are in houses obviously erected for being a TAT office, some in interesting architectural styles, others in nondescript buildings.
See here as well:
List alphabetically by their English name (Phra Nakhon Si Ayutthaya filed as Ayutthaya), data from http://www.tatnews.org/tat-local-offices/ slightly edited.
600 m west of MRT Phetchaburi. TAT sign on side of building can be seen from far away.
3. TAT Chachoengsao Office
I have been to the temporary office.
6. TAT Chumphon Office
7. TAT Hat Yai Office
I have been in Jan 2015 but didn't take picture. Update 2sep2017:
8. TAT Kanchanaburi Office
I have been, but can't find the pictures. Take new on 29dec2017:
9. TAT Khon Kaen Office
Tourist Information Lampang Municipality
Sop Tui, Mueang Lampang District, Lampang 52100
small office, but real branch is 50 m N of ห้าแยกหอนาฬิกา
สำนักศิลปากรที่ 4 ลพบุรี The 4th regional office of fine arts Lopburi, and moved to 14.799985, 100.651173 = 14°47'60.0"N 100°39'04.2"E on the grounds of Lopburi City Hall ศาลากลางจังหวัดลพบุรี (NW corner of Narai Traffic circle).
I have seen it driving past on bus.
16. TAT Nakhon Phanom Office
TAT Nakon Sawan
1045/2 ถ พิษณุโลก ต อ เมือง Wat Sai, Amphoe Mueang Nakhon Sawan, Chang Wat Nakhon Sawan 60000
Visited 8nov2017, and staff told me it has been open for 8 months and I'm the first foreigner to visit them.
18. TAT Nakhon Si Thammarat Office
I have been in Aug 2014 but didn't take pictures.
Hwy 4084, southern side, out of town directly after the bridge.
20. TAT Pattaya Office
I have been many times, and taking another picture next time I go is faster than searching for pictures I took in the past. Update 16sep2017:
I have been in Aug 2015 but didn't take pictures.
(I took frontal pictures from middle of road on another visit, just can't find it!)
28. TAT Samut Songkhram Office
14°28'27.4"N 100°07'04.3"E = 14.474286, 100.117870
on the grounds of ที่ว่าการอำเภอเมืองสุพรรณบุรี
32. TAT Surin Office
33. TAT Tak Office
7.551704, 99.610149 = 7°33'06.1"N 99°36'36.5"E
35. TAT Trat Office
36. TAT Ubon Ratchathani Office
37. TAT Udon Thani Office
38. TAT Uthai Thani Office
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