The following NPCs can be found in Wetlands.
Questgivers
Alliance
Captain Stoutfist
[10-30] Assault on Menethil Keep
[10-30] Swiftgear Station
Damaged Crate
[10-30] The Search Continues
Derina Rumdnul
[10-30] A Mother's Worries
Dunlor Marblebeard
[10-30] Thresh Out of Luck
[10-30] Fenbush Berries
[10-30] Incendicite Ore
Ferilon Leafborn
[10-30] For Peat's Sake
[10-30] Longbraid the Grim
First Mate Fitzsimmons
[10-30] The Third Fleet
[10-30] Cursed to Roam
First Mate Snellig
[10-30] The Cursed Crew
[10-30] Lifting the Curse
Floodsurge Core
[10-30] The Floodsurge Core
Forba Slabchisel <Royal Stonecutters Union>
[10-30] Fight the Flood
[10-30] Drungeld Glowerglare
[10-30] Get Out Of Here, Stalkers
[10-30] Onwards to Menethil
Fradd Swiftgear <Engineering Supplies>
[10-30] I'll Call Him Bitey
[10-30] Gizmos and Gadgets
Half-buried Barrel
[10-30] Return the Statuette
Huntress Iczelia <The Sentinels>
[10-30] The Crazed Dragonmaw
Intrepid's Locked Strongbox
[10-30] The Eye of Paleth
James Halloran
[10-30] Crocolisk Hides
[10-30] Hunting Horrorjaw
Karl Boran
[10-30] When Life Gives You Crabs
[10-30] Claws from the Deep
[10-30] Reclaiming Goods
Longbraid the Grim
[10-30] Anvilmar the Hero
Merrin Rockweaver <Explorers' League>
[10-30] Tooling Around
Mountaineer Grugelm
[10-30] Cleaning Hovel
Mountaineer Rharen
[10-30] The Stolen Keg
[10-30] Keg Run
Ormer Ironbraid
[10-30] Strike the Earth!
Prospector Whelgar <Explorers' League>
[10-30] When Archaeology Attacks
[10-30] The Angerfang Menace
[10-30] Who Wards The Greenwarden
Rethiel the Greenwarden
[10-30] Mired in Hatred
[10-30] The Threat of Flame
Sealed Barrel
[10-30] Search More Hovels
Shilah Slabchisel
[10-30] Dinosaur Crisis
[10-30] The Mosshide Job
[10-30] Dark Iron Trappers
[10-30] Gnoll Escape
[10-30] Yorla Darksnare
[10-30] Whelgar's Retreat
Surveyor Thurdan
[10-30] Sedimentary, My Dear
[10-30] A Dumpy Job
[10-30] Down In Thelgen Rock
Thargas Anvilmar <Defender of Thandol Span>
[10-30] The Twilight's Hammer Revealed
[10-30] The Battle of Thandol Span
[10-30] Into Arathi
Neutral
Wonderform Operator <Smokywood Pastures> (Feast of Winter Veil)
[1-60] Winter's Presents (Feast of Winter Veil)
[1-60] New Year Celebrations! (New Year's Eve)
Profession (Tradeskill) Trainers
Alliance
Fremal Doohickey <First Aid Trainer>
Harold Riggs <Fishing Trainer>
Telurinon Moonshadow <Herbalism Trainer>
Merchants
Alliance
Aluril <Reagents>
Brahnmar <Armorer>
Brak Durnad <Weaponsmith>
Breg FullBeard <Provisioner>
Cedric Bronzeflint <General Goods>
Darvish Quickhammer <Blacksmithing Supplies>
Dewin Shimmerdawn <Alchemy Supplies>
Dunlor Marblebeard (General Goods)
Edwina Monzor <Bowyer>
Engineer Combs <The Lady Mehley>
Falkan Armonis <Reagents>
Galley Chief Grace <The Lady Mehley>
Gruham Rumdnul <General Supplies>
Innkeeper Daughny <Innkeeper>
Innkeeper Helbrek <Innkeeper>
Jennabink Powerseam <Tailoring Supplies & Speciality Goods>
Kersok Prond <Tradesman>
Murndan Derth <Gunsmith>
Naela Trance <Bowyer>
Neal Allen <Engineering Supplies & General Goods>
Samor Festivus <Shady Dealer>
Stuart Fleming <Fishing Supplies>
Teep Topup <Engineering & Mining Supplies>
Unger Statforth <Horse Breeder>
Victorina <Weaponsmith>
Wenna Silkbeard <Special Goods Dealer>
Neutral
Kixxle <Potions & Herbs>
Various Services
Alliance
Adam Lind - (Dockmaster)
Bethaine Flinthammer <Stable Master>
Caleb Baelor <Gryphon Master>
Damon Baelor <Gryphon Master>
Elgin Baelor <Gryphon Master>
Halana <Hippogryph Master>
Innkeeper Daughny <Innkeeper>
Innkeeper Helbrek <Innkeeper>
Innkeeper Larisal <Innkeeper>
Ironforge Mountaineer - (Directions)
Ludin Farrow <Dockmaster>
Mounted Ironforge Mountaineer - (Directions)
Salustred <Stable Master>
Shellei Brondir <Gryphon Master>
Shep Goldtend <Stable Master>
Neutral
Wonderform Operator <Smokywood Pastures> (Feast of Winter Veil)
Other Notable NPCs
Alliance
Abe the Cabin Boy <The Lady Mehley>
Andrea Halloran
Archaeologist Flagongut <Explorers' League>
Bart Tidewater <Captain of the Maiden's Virtue>
Brisket <Slabchisel's Ram>
Caitlin Grassman
Camerick Jongleur <Wandering Minstrel>
Captain John Brookman <Northspear>
Captain "Stash" Torgoley <The Lady Mehley>
Comar Villard
Gimlok Rumdnul
Glorin Steelbrow
First Mate Kacy Dishon <Northspear>
First Mate Kowalski <The Lady Mehley>
Hargin Mundar
Jeffrey Gregarius
Jesse Halloran
Junder Brokk
Lieutenant Timothy Clark
Marine Anderson
Marine Halters
Mikhail <Bartender>
Motley Garmason
Mountaineer Thar
Murphy West
Navigator Marcus <Northspear>
Navigator Mehran <The Lady Mehley>
Red Jack Flint
Regina Halloran
Rhag Garmason
Roggo Harlbarrow
Sailor Berg <Northspear>
Sailor Davies <Northspear>
Sailor Henders <The Lady Mehley>
Sailor Jansen <Northspear>
Sailor Vines <The Lady Mehley>
Sailor Wicks <The Lady Mehley>
Spaz <Jeffrey's Companion>
Tapoke "Slim" Jahn
Tarrel Rockweaver
Thomas Booker
Valstag Ironjaw
Vasuuvata
Vincent Hyal
Horde
Captain Krazz
Fergus Gearchum
Garrosh Hellscream <Warchief of the Horde>
Hostile
Balgaras the Foul
Calamoth Ashbeard <Herald of the Twilight's Hammer>
Captain Halyndor
Drungeld Glowerglare
Garneg Charskull (Rare)
Gazz the Loch-Hunter (Rare)
Gnawbone (Rare)
Gobbler
Gorfax Angerfang
Horghast Flarecrazed
Horrorjaw
Leech Widow (Rare)
Ma'ruk Wyrmscale <Dragonmaw Warlord> (Rare)
Mirelow (Rare)
Pyrricion (Elite)
Razormaw Matriarch (Rare)
Rufus Darkshot (Rare)
Sarltooth (Rare)
Sludginn (Rare)
Torrention
Two-Toes (Rare)
Yorla Darksnare