The following NPCs can be found in Swamp of Sorrows.
Questgivers
Alliance
Anchorite Avuun
[15-30] Onward to the Blasted Lands- [15-30] Prayerblossom
- [15-30] Secrets of the Mire
- [15-30] The Purespring
- [15-30] Breath of Mist
- [15-30] Remember the Light
- Holaaru
- [15-30] Draenethyst Crystals
- [15-30] The Lost Ones
- [15-30] The Harborage
- Joanna Blueheart <Marshride Watch Commander>
- [15-30] Lumbering Oafs
- [15-30] Orcs and Humans
- [15-30] Marking the Fallen
- [15-30] Reinforcements Denied
- [15-30] Tides of Darkness
- [15-30] Assault on Stonard
- [15-30] Cutting Supply
Horde
- Dispatch Commander Ruag
- [15-30] Lumbering Oafs
- [15-30] Orcs and Humans
- [15-30] Marking the Fallen
- [15-30] Reinforcements Denied
- [15-30] Tides of Darkness
- [15-30] We're Under Attack!
- [15-30] Neeka Bloodscar
- [15-30] Okrilla and the Blasted Lands
- Neeka Bloodscar
- [15-30] Prayerblossom
- [15-30] Secrets of the Mire
- [15-30] Last Regrets
- [15-30] The Purespring
- [15-30] With Dying Breath
- [15-30] Ruag's Report
Neutral
- Baba Bogbrew
- [15-30] Marshfin Madness
- [15-30] The Darkest Depths
- [15-30] Slithering Signs
- [15-30] The Dragon and the Temple
- Brono Goodgroove
- [15-30] Drinks on the Rocks
- Crazy Larry
- [15-30] Can't Take It With Them
- [15-30] Kill Gil
- [15-30] In with a Bang
- [15-30] Baba Bogbrew
- Lord Itharius
- [15-30] Pool of Tears
- [15-30] Legends of the Sunken Temple
- [15-30] Step One: The Priestess
- [15-30] Step Two: The Bloodletter
- [15-30] Step Three: Prophet
- [15-30] Blessing of the Green Dragonflight
- [20-30D] The Heart of the Temple (Dungeon: Temple of Atal'Hakkar)
- [15-30] To Stonard
- Pierre Fishflay <Chef de Cuisine>
- [15-30] Tastes Like Strider
- Trade Baron Silversnap <Baron of Bogpaddle>
- [15-30] Maliciously Delicious
- [15-30] Croc-Out
- [15-30] Mostly Harmless
- [15-30] Crazy Larry
Class Trainers
Horde
- Haromm <Shaman Trainer>
- Kartosh <Warlock Trainer>
- Lorrin Foxfire <Portal Trainer>
- Malosh <Warrior Trainer>
- Ogromm <Hunter Trainer>
- Grokor <Pet Trainer>
Profession (Tradeskill) Trainers
Horde
- Rogvar <Alchemy Trainer>
Merchants
Alliance
- Hull Forgehammer <Blacksmithing Supplies>
- Masat T'andr <Superior Leatherworker>
- Rebecca Blackman <Food & Drink>
- Verad <Innkeeper>
Horde
- Banalash <Trade Supplies>
- Gharash <Blacksmithing Supplies>
- Grimnal <Mail & Plate Merchant>
- Hartash <Weapon Merchant>
- Innkeeper Karakul <Innkeeper>
- Rartar <Alchemy Supplies>
- Thralosh <Cloth & Leather Armor Merchant>
- Thultash <Food & Drink Vendor>
- Thultazor <Alchemy Supplies & Reagents>
Neutral
- Brita Bramblebrush <Alchemy Supplies>
- Bullets Bigblast <Engineering Supplies>
- Cap'n Geech <Innkeeper>
- Darbo Stableflux <Blacksmithing Supplies>
- Dronk Drophammer <Blacksmithing Supplies>
- Frankie Goodtimes <Food & Drink>
- Kizter Kahboom <Engineering Supplies>
- Mitch Yostpaddle <Trade Goods>
- Pierre Fishflay <Chef de Cuisine>
- Sid Shillcopper <Food & Drink>
- Skinner Selma <Leatherworking Supplies>
- Spike Coilee <Herbalism Supplies>
- Zipper Sizzlesnap <Fishing Supplies>
Various Services
Alliance
- Joran <Stable Master>
- Paola Baldwin <Gryphon Master>
- Verad <Innkeeper>
- Yedrin <Flight Master>
Horde
- Breyk <Wind Rider Master>
- Hekkru <Stable Master>
- Innkeeper Karakul <Innkeeper>
Neutral
- Cap'n Geech <Innkeeper>
- Shecky Shrimpshoot <Stable Master>
- Skeezie <Gryphon Master>
Other Notable NPCs
Alliance
Horde
Neutral
Hostile
- Dreamwatcher Forktongue <Victim of the Nightmare> (Rare)
- Duskfang
- Fingat (Rare)
- Gilmorian (Rare)
- Hr'nglth the Lost
- Jade <Victim of the Nightmare> (Rare)
- Lost One Chieftain (Rare)
- Lost One Cook (Rare)
- Molt Thorn (Rare)
