Beating Barnsley 1-0 with a 119th-minute winner at Wembley, the Owls joins Plymouth Argyle and Ipswich Town in the second tier.
Leyton Orient, Stevenage and Northampton Town were joined by Carlisle United in promotion on Sunday after beating Stockport County on penalties in the League Two play-offs.
Now facing a first third tier campaign since 2002, the Royals do battle with a mixture of regular opponents and some which they have never met in competitve action.
Take a look below at the full list of League One teams for next year:
Barnsley
Blackpool
Bolton Wanderers
Bristol Rovers
Burton Albion
Cambridge United
Carlisle United
Charlton Athletic
Cheltenham Town
𝗘𝗙𝗟 𝗟𝗲𝗮𝗴𝘂𝗲 𝗢𝗻𝗲 𝟮𝟯-𝟮𝟰
𝗖𝗹𝘂𝗯 𝗠𝗮𝗽League One line-up complete ✅ #BarnsleyFC #UTMP #BWFC #BRFC #BAFC #CamUtd #CUFC #CAFC #CTFC #DCFC #ECFC #FTFC #LOFC #Imps #NTFC #OUFC #Posh #PVFC #Pompey #ReadingFC #Shrews #StevenageFC #WAFC #Chairboys pic.twitter.com/G0DSUh1Asp
— EFL Stats (@EFLStats) May 29, 2023
Derby County
Exeter City
Fleetwood Town
Leyton Orient
Lincoln City
Northampton Town
Oxford United
Peterborough United
Port Vale
Portsmouth
Shrewsbury Town
Stevenage
Wigan Athletic
Wycombe Wanderers