Combined EU/NA
1) Tarnished Coast 477
2) Riverside [DE] 464
3) Elona Reach [DE] 461
4) Kodash [DE] 443
5) Jade Quarry 440
6) Drakkar Lake [DE] 440
7) Abaddon’s Mouth [DE] 431
8) Blackgate 412
9) Vizunah Square [FR] 412
10) Baruch Bay [SP] 407
11) Jade Sea [FR] 390
12) Desolation 356
13) Gandara 353
14) Seafarer’s Rest 353
15) Henge of Denravi 352
16) Dzagonur [DE] 339
17) Miller’s Sound [DE] 332
18) Augury Rock [FR] 319
19) Fort Aspenwood 314
20) Piken Square 310
21) Sea of Sorrows 299
22) Fort Ranik [FR] 279
23) Yak’s Bend 275
24) Far Shiverpeaks 268
25) Aurora Glade 266
26) Borlis Pass 257
27) Gunnar’s Hold 250
28) Dragonbrand 248
29) Ruins of Surmia 247
30) Stormbluff Isle 246
31) Maguuma 245
32) Ring of Fire 241
33) Arborstone [FR] 239
34) Crystal Desert 239
35) Isle of Janthir 232
36) Ehmry Bay 230
37) Northern Shiverpeaks 227
38) Sorrow’s Furnace 226
39) Darkhaven 222
40) Ferguson’s Crossing 216
41) Devona’s Rest 216
42) Gate of Madness 204
43) Sanctum of Rall 201
44) Vabbi 200
45) Whiteside Ridge 199
46) Blacktide 185
47) Anvil Rock 168
48) Eredon Terrace 156
49) Fissure of Woe 141
50) Kaineng 138
51) Underworld 130
NA
1) Tarnished Coast 477
2) Jade Quarry 440
3) Blackgate 412
4) Henge of Denravi 352
5) Fort Aspenwood 314
6) Sea of Sorrows 299
7) Yak’s Bend 275
8) Borlis Pass 257
9) Dragonbrand 248
10) Stormbluff Isle 246
11) Maguuma 245
12) Crystal Desert 239
13) Isle of Janthir 232
14) Ehmry Bay 230
15) Northern Shiverpeaks 227
16) Sorrow’s Furnace 226
17) Darkhaven 222
18) Ferguson’s Crossing 216
19) Devona’s Rest 216
20) Gate of Madness 204
21) Sanctum of Rall 201
22) Anvil Rock 168
23) Eredon Terrace 156
24) Kaineng 138
EU
1) Riverside [DE] 464
2) Elona Reach [DE] 461
3) Kodash [DE] 443
4) Drakkar Lake [DE] 440
5) Abaddon’s Mouth [DE] 431
6) Vizunah Square [FR] 412
7) Baruch Bay [SP] 407
8) Jade Sea [FR] 390
9) Desolation 356
10) Gandara 353
11) Seafarer’s Rest 353
12) Dzagonur [DE] 339
13) Miller’s Sound [DE] 332
14) Augury Rock [FR] 319
15) Piken Square 310
16) Fort Ranik [FR] 279
17) Far Shiverpeaks 268
18) Aurora Glade 266
19) Gunnar’s Hold 250
20) Ruins of Surmia 247
21) Ring of Fire 241
22) Arborstone [FR] 239
23) Vabbi 200
24) Whiteside Ridge 199
25) Blacktide 185
26) Fissure of Woe 141
27) Underworld 130
This is based on number of guilds that have claimed structures since April 5th, 2014 see http://gw2.brutebyte.com/api2/
Remember, this is only a rough measurement of how many guilds each server has. These guilds could have a membership of anywhere between 1 to 500 members. Many guilds could be run by the same people. Also, some WvW guilds never claim structures.
A few interesting points to consider from the data.
1) German servers have the most guilds (only beaten by unofficial role-playing server Tarnished Coast overall)
2) If all guilds were equal, then Tarnished Coast would be about 4 times the population of Underworld
3) Number of registered guilds is correlates strongly with weekly WvW rankings but some servers like Seafarer’s Rest might be doing better with less guilds (again we don’t know the exact sizes of their guilds so they might have bigger or better guilds than Riverside).