Where to Farm Thorium Ore: Drop Rates by NPC and Zone

The best place to farm Thorium Ore is Eastern Plaguelands, where Living Decay (level 55-56) drops it at 1.5%. That is the vanilla 1.12 chance, not yet confirmed in Forever. 385 sources are ranked below by drop chance.

Gold per kill: Living Decay is worth about 14s 5c a kill in item drops (at Auction House prices). Gold farming spots, level 50-60

Best zones:

The 15 zones with the best source; every source is listed below.
Zone	Sources	Best source	Level	Drop%
Silithus	34	Small Thorium Vein		100.0%
Zul'Gurub	19	Hakkari Thorium Vein		100.0%
Felwood	37	Small Thorium Vein		100.0%
Un'Goro Crater	38	Ooze Covered Thorium Vein		100.0%
Winterspring	45	Rich Thorium Vein		100.0%
Swamp of Sorrows	4	Small Thorium Vein		100.0%
Blasted Lands	28	Kirith the Damned	55+	2.5%
Eastern Plaguelands	48	Living Decay	55-56	1.5%
Western Plaguelands	24	Foreman Jerris	62+	1.5%
Burning Steppes	31	Firetail Scorpid	56-57	0.7%
Feralas	7	Zukk'ash Tunneler	45-46	0.3%
Searing Gorge	16	Muck Splash	47-49	0.3%
Azshara	29	Timbermaw Den Watcher	49-50	0.2%
Tanaris	12	Hazzali Tunneler	48-49	0.2%
The Hinterlands	7	Vilebranch Aman'zasi Guard	50-51+	0.1%

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Map of Silithus — Ooze Covered Rich Thorium Vein **39.8, 13.3**
Mistress Natalia Mar'alith **52.0, 100.0**
Hive'Regal Hive Lord **57.1, 100.0**
Rex Ashil **45.7, 28.9**
Hive'Ashi Defender **38.5, 12.8**
Hive'Zora Hive Sister **20.5, 64.8**
Hive'Zora Tunneler **19.1, 66.8**
Hive'Regal Ambusher **53.2, 99.5**
8 sources in Silithus, each where it spawns most often; click a pin for the source.Larger map

All sources, by drop chance:

Classic data: from the patch 1.12 world data, not yet confirmed in Forever.
Source	Level	Zone	Spawns	How	Drop%	Map
Hive'Regal Burrower(elite)	59-60+	Silithus	11	Drop	0.3%	map
Frostmaul Giant(elite)	59-60+	Winterspring	27	Drop	0.3%	map
High Chief Winterfall(elite)	59+	Winterspring	1	Drop	0.3%	map
Gorishi Reaver	51-53	Un'Goro Crater	24	Drop	0.3%	map
Hakkari Witch Doctor(elite)	60+	Zul'Gurub	7	Drop	0.3%	map
Voodoo Slave(elite)	60+	Zul'Gurub	9	Drop	0.3%	map
Devouring Ooze	55-56	Western Plaguelands	26	Drop	0.3%	map
Zukk'ash Tunneler	45-46	Feralas	29	Drop	0.3%	map
Muck Splash	47-49	Searing Gorge	9	Drop	0.3%	map
Salia	54	Felwood	1	Drop	0.3%	map
Ursius(elite)	56+	Winterspring	1	Drop	0.2%	map
Hive'Zora Reaver(elite)	59-60+	Silithus	29	Drop	0.2%	map
Hive'Regal Spitfire(elite)	59-60+	Silithus	38	Drop	0.2%	map
Slaughterhouse Protector(elite)	58+	Eastern Plaguelands	2	Drop	0.2%	map
Frostsaber	56-57	Winterspring	23	Drop	0.2%	map
Scarlet Curate(elite)	55-56+	Eastern Plaguelands	14	Drop	0.2%	map
Flamekin Rager	54-56	Burning Steppes	30	Drop	0.2%	map
Hive'Ashi Sandstalker(elite)	58-59+	Silithus	16	Drop	0.2%	map
Hive'Ashi Swarmer(elite)	57-58+	Silithus	45	Drop	0.2%	map
Hazzali Worker	47-48	Tanaris	60	Drop	0.2%	map
Hazzali Tunneler	48-49	Tanaris	60	Drop	0.2%	map
Twilight Geomancer(elite)	49-50+	Searing Gorge	12	Drop	0.2%	map
Timbermaw Den Watcher	49-50	Azshara	21	Drop	0.2%	map
Un'Goro Thunderer	52-53	Un'Goro Crater	20	Drop	0.2%	map
Gorishi Worker	51-52	Un'Goro Crater	58	Drop	0.2%	map
Cobalt Wyrmkin(elite)	55-56+	Winterspring	36	Drop	0.2%	map
Slave Master Blackheart(rare)	50	Searing Gorge	1	Drop	0.2%	map
Zulian Cub	60	Zul'Gurub	12	Drop	0.2%	map
Rotting Behemoth	55-56	Western Plaguelands	39	Drop	0.2%	map
Un'Goro Stomper	51-52	Un'Goro Crater	26	Drop	0.2%	map
Greater Obsidian Elemental	55-57	Burning Steppes	8	Drop	0.2%	map
Scalding Drake(elite)	53-55+	Burning Steppes	2	Drop	0.2%	map
Cobalt Scalebane(elite)	56-57+	Winterspring	36	Drop	0.2%	map
Withered Mistress(elite)	60+	Zul'Gurub	29	Drop	0.2%	map
Magma Lord Bokk	60	Burning Steppes	1	Drop	0.2%	map
Vile Slime	54-55	Western Plaguelands	13	Drop	0.2%	map
Carrion Lurker	52-53	Western Plaguelands	63	Drop	0.2%	map
Scarlet Sentinel(elite)	55-56+	Western Plaguelands	24	Drop	0.2%	map
Dreadmaul Ogre	45-46	Blasted Lands	17	Drop	0.2%	map
Servant of Arkkoroc(elite)	53-54+	Azshara	20	Drop	0.2%	map
Timbermaw Shaman	50-51	Azshara	74	Drop	0.2%	map
Gorishi Wasp	51-52	Un'Goro Crater	58	Drop	0.2%	map
Firegut Brute	52-53	Burning Steppes	24	Drop	0.2%	map
Searscale Drake(elite)	56-58+	Burning Steppes	4	Drop	0.2%	map
Cobalt Mageweaver(elite)	57-58+	Winterspring	36	Drop	0.2%	map
Scourge Guard	57-58	Eastern Plaguelands	14	Drop	0.2%	map
Mossflayer Shadowhunter	58-59	Eastern Plaguelands	25	Drop	0.2%	map
Mossflayer Cannibal	57-59	Eastern Plaguelands	13	Drop	0.2%	map
Hazzali Sandreaver	49-50	Tanaris	60	Drop	0.1%	map
Scarlet Priest(elite)	55-57+	Western Plaguelands	4	Drop	0.1%	map
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Needed for:

Recipes:

Recipe	Profession	Needs
Greater Stoneshield Potion	Alchemy	1x
Smelt Thorium	Mining	1x

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Drop% is the rate recorded in Forever once a source has been looted ten times; a greyed figure is the vanilla 1.12 chance from the world data (classic data: from the patch 1.12 world data, not yet confirmed in forever). Spawns counts the source's spawn points in the world data. "Side" names which side can kill the NPC when the other finds it friendly. The lead picks the best chance among sources that are not a rare spawn and have at least three spawn points.

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