2023–24 Sutton United F.C. season

The 2023–24 season is the 97th season in the history of Sutton United and their third consecutive season in League Two. The club are participating in League Two, the FA Cup, the EFL Cup, and the 2023–24 EFL Trophy.

Pre-season and friendlies
On 15 May, Sutton United announced their first three pre-season friendlies, against Havant & Waterlooville, Farnborough and Woking. Three days later, a home friendly against Reading was confirmed. A further two friendlies were later added, against Millwall and Aldershot Town.

Matches
On 22 June, the EFL League Two fixtures were released.

FA Cup
Sutton were drawn at home to AFC Fylde in the first round and to either Barnsley or Horsham in the second round. On 14 November, Barnsley won their replay 3–0 and were confirmed as the opponents for the U's, However Barnsley were removed from the competion for fielding an ineligible player, therefore Horsham are now the second round visitors. In the third round, the U's were drawn away to Plymouth Argyle.

EFL Cup
U's were drawn at home to Cambridge United in the first round, and away to Wycombe Wanderers in the second round and Port Vale in the third round.

EFL Trophy
In the group stage, Sutton were drawn in alongside Charlton Athletic, Crawley Town and Aston Villa U21.