| artist,genre,country | |
| YA HO WHA 13,Krautrock,United States | |
| PH AAN-ZEK,Jazz Rock/Fusion,United Kingdom | |
| YAAROTH,Heavy Prog,United States | |
| TAK ABUKI,Jazz Rock/Fusion,Japan | |
| YACOBS,Neo-Prog,Germany | |
| GABRIE ACOUB,Prog Folk,France | |
| YAK,Neo-Prog,United Kingdom | |
| YAKUZA,Experimental/Post Metal,United States | |
| YALDABAOTH,Tech/Extreme Prog Metal,United States | |
| STOM AMASH'TA,Jazz Rock/Fusion,Japan | |
| HIR ANAGIDA,Psychedelic/Space Rock,Japan | |
| YANG,Heavy Prog,France | |
| RYA ARD,Crossover Prog,United Kingdom | |
| YATHA SIDHRA,Krautrock,Germany | |
| YAVANNA,Prog Folk,Germany | |
| YAVU,Experimental/Post Metal,Chile | |
| YAWN,Experimental/Post Metal,Norway | |
| YAWN HIC,Post Rock/Math rock,Russia | |
| YAWNING SONS,Psychedelic/Space Rock,Multi-National | |
| YAZYK DOZHDYA,Post Rock/Math rock,Russia | |
| YAZZBOT MAZUT,Jazz Rock/Fusion,Poland | |
| YBO˛,RIO/Avant-Prog,Japan | |
| YEAR OF NO LIGHT,Experimental/Post Metal,France | |
| YEAR ONE,Eclectic Prog,United States | |
| YEARS OF RICE AND SALT,Post Rock/Math rock,United Kingdom | |
| YEARSTONES,Heavy Prog,Norway | |
| TH ELLOW BOX,Symphonic Prog,United States | |
| YELLOW MAGIC ORCHESTRA,Progressive Electronic,Japan | |
| THE ELLOW MOON BAND,Psychedelic/Space Rock,United Kingdom | |
| YEN POX,Progressive Electronic,United States | |
| TH EQY,Progressive Metal,Serbia | |
| YES,Symphonic Prog,United Kingdom | |
| YESTERDAYS,Symphonic Prog,Romania | |
| YETI,RIO/Avant-Prog,United States | |
| YETI RAIN,Progressive Electronic,United States | |
| LE EUX DE LA TĘTE,RIO/Avant-Prog,France | |
| YEZDA URFA,Eclectic Prog,United States | |
| YGGDRASIL,Eclectic Prog,Faroe Islands | |
| YGGDRASIL,Prog Folk,Germany | |
| YGGDRAZIL,Heavy Prog,Italy | |
| YIANNEIS,RIO/Avant-Prog,Greece | |
| YLECLIPSE,Neo-Prog,Italy | |
| YNDI HALDA,Post Rock/Math rock,United Kingdom | |
| YOB,Experimental/Post Metal,United States | |
| YOBREPUS,Crossover Prog,Norway | |
| YOG SOTHOTH,RIO/Avant-Prog,France | |
| YOJO,Jazz Rock/Fusion,Russia | |
| YOKAI,Psychedelic/Space Rock,Belgium | |
| YOKE SHIRE,Prog Folk,United States | |
| YOLE,Eclectic Prog,France | |
| YOLK,RIO/Avant-Prog,Switzerland | |
| YOLK,RIO/Avant-Prog,France | |
| YONHOSAGO,RIO/Avant-Prog,Chile | |
| YONIN BAYASHI,Eclectic Prog,Japan | |
| YOO DOO RIGHT,Krautrock,Canada | |
| THO ORKE,Crossover Prog,United Kingdom | |
| TATSUY OSHIDA,RIO/Avant-Prog,Japan | |
| YOU,Progressive Electronic,Germany | |
| YOU ALREADY KNOW,Post Rock/Math rock,United Kingdom | |
| YOU AND I,Prog Folk,Hungary | |
| YOU SLUT!,Post Rock/Math rock,United Kingdom | |
| YOU.MAY.DIE.IN.THE.DESERT,Post Rock/Math rock,United States | |
| LARR OUNG,Jazz Rock/Fusion,United States | |
| MICHELL OUNG,Crossover Prog,United States | |
| DAVI OUNGER,Neo-Prog,United Kingdom | |
| YOUR ELECTRIC GRANDMOTHER,Crossover Prog,United States | |
| YOUR TEN MOFO,Post Rock/Math rock,Austria | |
| YOUTH PICTURES OF FLORENCE HENDERSON,Post Rock/Math rock,Norway | |
| YOUTHMOVIES,Post Rock/Math rock,United Kingdom | |
| YOWIE,RIO/Avant-Prog,United States | |
| YSMA,Heavy Prog,Germany | |
| YTO SOLREISER,Experimental/Post Metal,Norway | |
| YUGEN,RIO/Avant-Prog,Italy | |
| YUKA & CHRONOSHIP,Neo-Prog,Japan | |
| YUKON TERRITORIAL EXPANSION,Psychedelic/Space Rock,United States | |
| YUME BITSU,Psychedelic/Space Rock,United States | |
| YUREI,Progressive Metal,Canada | |
| YURI GAGARIN,Psychedelic/Space Rock,Sweden | |
| YURT,Heavy Prog,Ireland | |
| YUUKAI KENCHIKU,Jazz Rock/Fusion,Japan | |
| YUVIGI,Progressive Metal,Bulgaria | |
| FERNAND VOSKY,Crossover Prog,Venezuela | |
| YWIS,Neo-Prog,Netherlands | |
| YYNOT,Heavy Prog,United States | |
| YYRKOON,Tech/Extreme Prog Metal,France | |