- Xiivan Young
- XIIVI (Artist from Tunis)
- xikers
- Xile (New Zealand hardcore)
- Xilent (producer Eryk Kowalczyk)
- Xilent feat. Diamond Eyes
- Xilent feat. Grimm
- Xilla (American rapper)
- Xillions
- xin
- Xindl X (Czech folk pop singer-songwriter)
- Xinlisupreme
- Xinobi
- Xipe Totec (Death Metal band from Mexico)
- Xiphea
- Xique-Xique (DJ/producer duo Dunwich & Biba Graeff)
- Xirita (Low‐Fi Electronic, Alternative & R’n’B‐Pop)
- Xis
- XisForEyes
- XIT (native American rock band)
- Xiu Xiu (American experimental band)
- Xiu Xiu vs. Grouper
- XIUMIN (EXO)
- Xiupill (Icelandic experimental pop trio)
- XIV Dark Centuries
- XIXA (Band (Brian Lopez and Gabriel Sullivan))
- xKhen (Lithuanian artist)
- xKINGx (Downtempo, Metal)
- xKore
- Xkrude
- XL5 (Finnish group)
- xLooking Forwardx
- XLR (french hip hop)
- Xlson137 (UA rapper)
- Xmal Deutschland
- XMASwu
- XMawja (software engineer)
- xMeans to an Endx (Hardcore from Winnipeg)
- XMH
- xNOMADx (Vegan Edge Metal from the Northeast)
- XO (US rapper, member of Diamond District, aka Uptown XO)
- XO (Californian rock band)
- XO (Producer, Staffordshire, UK)
- XO (California shoegaze band)
- xo purp
- XO TEAM
- XO Xuded
- XO‐IQ
- XO‐IQ feat. Slachta, John‐Alan
- XO, MoneyBaby & Reddy, PullUp
- XOAN
- XoBrooklynne
- XOC (Jason Cox)
- Xoch
- Xochimilcas, Los
- XODIAC (South Korean boy group)
- xojira
- Xolo (L.A.-based dream pop duo)
- Xolotl (USA, Black Metal)
- XOMG POP!
- Xomu
- xooos
- Xorcist
- Xordia
- Xose Lois Romero & Aliboria
- Xoth (Technical Death/Black/Thrash Metal from Seattle)
- xotox
- XOV (Swedish singer-songwriter)
- XOXO's, The
- Xoxocapa, Trío
- XP Voodoo
- XP8
- Xpansions (known for ‘Move Your Body’)
- Xpansions 95 (AKA Xpansions)
- XPDC
- Xperience (US rapper, a.k.a. XP)
- Xperiment (aggrotech band from Spain)
- Xploding Plastix
- Xploding Plastix feat. Cracknell, Sarah
- Xplore Yesterday
- XPQ-21
- xPropaganda (Claudia Brücken und Susanne Freytag, former 'Propaganda')
- Xquizit, DJ
- Xquizit, DJ feat. Hilberts, Tim
- XRaidX
- Xramovi, Misha
- XRay5, The (LA post-punk band)
- xRepresentx (American straight edge hardcore band)
- Xriz
- XRP Bags