The 2023 Old Dominion Monarchs football team represented Old Dominion University for the 2023 NCAA Division I FBS football season. The Monarchs played their home games at S.B. Ballard Stadium in Norfolk, Virginia. It was their second football season in the Sun Belt Conference, competing in the East Division. The team was coached by fourth-year head coach Ricky Rahne. The Old Dominion Monarchs football team drew an average home attendance of 17,847 in 2023.
In the Sun Belt preseason coaches' poll, the Monarchs were picked to finish in last place in the East division.
Jason Henderson was named the Preseason Defensive Player of the Year. Linebacker Jason Henderson was named to the preseason All-Sun Belt first team. Punter Ethan Duane was named to the second team.
The football schedule was announced February 24, 2023.