2023–24 Rotherham United F.C. season

The 2023–24 season is the 99th season in the history of Rotherham United and their second consecutive season in the Championship. The club are participating in the Championship, the FA Cup, and the EFL Cup.

Player statistics
 Players with zero appearances have been unused substitutes in one or more games.

Pre-season and friendlies
On 17 May, The Millers announched their first pre-season friendly, against Mansfield Town. Five days later, a second fixture was confirmed, against Parkgate. A third match was added against Lincoln City. In June, Premier League side Sheffield United was added to the pre-season schedule. On 6 June, a fifth and final pre-season fixture was announced, against Middlesbrough.

Also confirmed by the club was a week-long warm weather training camp in Murcia, Spain between 8 and 15 July.

Matches
On 22 June, the Championship fixtures were released.

FA Cup
As a Championship side, Rotherham entered the FA Cup in the third round and were drawn away to Fulham.

EFL Cup
Rotherham were drawn at home to Morecambe in the first round and away to Stoke City in the second round.