The 2023 Monterey Bay FC season was the club's second season since their establishment on February 1, 2021.
The Union finished their first ever season twelfth place in the Western Conference of the USL Championship, seven points away from the final playoff spot. The team also suffered an upset in their US Open Cup debut, losing against the 3rd division side Bay Cities FC.
In preparation for their second season, Monterey Bay brought back 17 players from their inaugural squad.
Monterey Bay FC entered into the tournament in the 2nd Round.