
The data is only as good as submissions of course, some servers like Archimonde actually have higher max populations but there are too few samples available to show that.
Oh, and I'm sure the formatting will be shredded posting but hopefully still legible.
Server ServerType Time Alliance Horde Ratio Total concurrent Max Notes:
Earthen Ring RP 22 2308 1033 2.2 : 1 3341
Warsong PVP 21 1854 1475 1.3 : 1 3329
Dark Iron PVP 20 1578 1747 1:1 3325
Argent Dawn RP 22 2372 946 2.5 : 1 3318
Dragonblight PVE 20 2314 984 2.4 : 1 3298
Arthas PVP 21 1943 1349 1.4 : 1 3292
Tichondrius PVP 20 1699 1548 1.1 : 1 3247
Skullcrusher PVP 22 1612 1622 1:1 3234
Hellscream PVE 21 1959 1242 1.6 : 1 3201
Illidan PVP 21 1539 1660 1:1.1 3199
Greymane PVE 19 2141 1053 2:1 3194
Blackrock PVP 23 1595 1596 1:1 3191
Feathermoon RP 19 2181 1007 2.2 : 1 3188
Shadow Council RP 20 2076 1090 1.9 : 1 3166
Burning Blade PVP 21 1789 1371 1.3 : 1 3160
Lightbringer PVE 20 2220 928 2.4 : 1 3148 poor
Sargeras PVP 21 1754 1392 1.3 : 1 3146
Cenarion Circle RP 19 2203 938 2.3 : 1 3141
Scarlet Crusade RP 21 2184 953 2.3 : 1 3137
Proudmoore PVE 19 2256 880 2.6 : 1 3136
Perenolde PVE 21 2096 1012 2.1 : 1 3108
Frostmane PVP 22 1738 1361 1.3 : 1 3099
Stormrage PVE 21 2102 994 2.1 : 1 3096
Blackhand PVE 21 1906 1168 1.6 : 1 3074
Silvermoon PVE 19 2212 855 2.6 : 1 3067
Bleeding Hollow PVP 21 1567 1479 1.1 : 1 3046
Ner'zhul PVP 20 1532 1512 1:1 3044
Doomhammer PVE 21 1991 1024 1.9 : 1 3015
Kel'Thuzad PVP 21 1700 1301 1.3 : 1 3001 poor
Zul'jin PVE 22 1769 1232 1.4 : 1 3001
Shadowsong PVE 20 2106 894 2.4 : 1 3000
Azjol-Nerub PVE 20 1899 1091 1.7 : 1 2990
Archimonde PVP 22 1452 1524 1:1 2976 very poor
Bloodhoof PVE 21 1908 1063 1.8 : 1 2971
Ursin PVP 21 1326 1631 1:1.2 2957
Whisperwind PVE 21 2164 791 2.7 : 1 2955
Burning Legion PVP 20 1651 1298 1.3 : 1 2949
Khadgar PVE 21 1963 974 2:1 2937
Bronzebeard PVE 19 2046 885 2.3 : 1 2931
Medivh PVE 21 2007 924 2.2 : 1 2931
Alleria PVE 21 2108 817 2.6 : 1 2925
Uther PVE 20 2061 862 2.4 : 1 2923
Silver Hand RP 21 1953 962 2:1 2915 poor
Suramar PVE 19 2019 894 2.3 : 1 2913
Windrunner PVE 19 2017 888 2.3 : 1 2905
Kargath PVE 22 2025 872 2.3 : 1 2897
Garona PVE 21 1992 888 2.2 : 1 2880
Shattered Hand PVP 21 1766 1108 1.6 : 1 2874
Dalaran PVE 21 1970 903 2.2 : 1 2873
Laughing Skull PVP 21 1436 1421 1:1 2857
Bloodscalp PVP 20 1342 1501 1:1.1 2843
Shadow Moon PVP 21 1699 1121 1.5 : 1 2820
Eonar PVE 22 1964 850 2.3 : 1 2814
Terenas PVE 20 1940 868 2.2 : 1 2808
Stormreaver PVP 20 1753 1054 1.7 : 1 2807 poor
Mannoroth PVP 22 1446 1352 1.1 : 1 2798
Lothar PVE 22 1874 918 2:1 2792
Durotan PVE 21 1870 912 2.1 : 1 2782
Icecrown PVE 20 1971 798 2.5 : 1 2769
Gilneas PVE 22 1935 833 2.3 : 1 2768 poor
Azgalor PVP 20 1639 1128 1.5 : 1 2767
Kil'Jaeden PVP 20 1708 1056 1.6 : 1 2764
Hyjal PVE 20 1855 905 2.1 : 1 2760
Deathwing PVP 19 1502 1256 1.2 : 1 2758
Kilrogg PVE 20 1745 1012 1.7 : 1 2757 very poor
Malygos PVE 21 1950 805 2.4 : 1 2755
Elune PVE 21 1979 771 2.6 : 1 2750
Llane PVE 20 1940 806 2.4 : 1 2746
Cenarius PVE 18 1876 867 2.2 : 1 2743 very poor
Draenor PVE 19 1890 844 2.2 : 1 2734
Aggramar PVE 21 1892 829 2.3 : 1 2721
Uldum PVE 19 1865 853 2.2 : 1 2718
Eldre'Thalas PVE 23 1747 966 1.8 : 1 2713 poor
Moonrunner PVE 19 1752 945 1.9 : 1 2697
Kalecgos PVP 20 1150 1505 1:1.3 2655
Skywall PVE 19 1692 927 1.8 : 1 2619
Thunderlord PVP 21 1562 1028 1.5 : 1 2590
Dragonmaw PVP 19 1491 1093 1.4 : 1 2584
Mal'Ganis PVP 21 1113 1471 1:1.3 2584 poor
Lightning's Blade PVP 21 1513 1068 1.4 : 1 2581
Magtheridon PVP 22 1523 1020 1.5 : 1 2543
Destromath PVP 19 1442 1090 1.3 : 1 2532
Darkspear PVP 19 1405 1109 1.3 : 1 2514
Thunderhorn PVE 21 1804 693 2.6 : 1 2497
Stormscale PVP 20 1400 1092 1.3 : 1 2492
Daggerspine PVP 19 1227 1255 1:1 2482
Crushridge PVP 20 1447 1026 1.4 : 1 2473
Gorefiend PVP 22 1317 1111 1.2 : 1 2428
Staghelm PVE 20 1549 879 1.8 : 1 2428
Bonechewer PVP 18 1282 1143 1.1 : 1 2425 poor
Eredar PVP 22 1346 1052 1.3 : 1 2398
Boulderfist PVP 19 1364 1006 1.4 : 1 2370
Spinebreaker PVP 19 1161 1207 1:1 2368 poor
Firetree PVP 22 1158 1207 1:1 2365
Nathrezim PVP 19 1287 1076 1.2 : 1 2363
Stonemaul PVP 19 1345 1009 1.3 : 1 2354
Wildhammer PVP 21 1064 1220 1:1.1 2284
Frostwolf PVP 21 1373 875 1.6 : 1 2248
Dunemaul PVP 18 1254 993 1.3 : 1 2247
Maelstrom RP-PVP 22 967 1244 1:1.3 2211
Twisting Nether RP-PVP 22 1030 1166 1:1.1 2196
Gorgonnash PVP 20 1187 984 1.2 : 1 2171
Emerald Dream RP-PVP 22 1142 1017 1.1 : 1 2159
Dethecus PVP 20 1194 900 1.3 : 1 2094
Spirestone PVP 20 1035 1016 1:1 2051
Smolderthorn PVP 22 996 920 1.1 : 1 1916 poor
Gurubashi PVP 21 894 1003 1:1.1 1897
Detheroc PVP 21 801 1015 1:1.3 1816