| Club: | Oita Trinita |
| Season: | 2023 |
| Chairman: | Masakaze Ozawa |
| Manager: | Takahiro Shimotaira |
| Stadium: | Resonac Dome Oita |
| League: | J2 League |
| League Result: | 10th |
| Cup1: | Emperor's Cup |
| Cup1 Result: | Second round |
| League Topscorer: | Hiroto Nakagawa (4) |
| Season Topscorer: | Hiroto Nakagawa (4) |
| Average Attendance: | 10,119 |
| Largest Loss: | Montedio Yamagata 5–0 Oita Trinita |
| Pattern La1: | _oita trinita 2023 HOME FP |
| Pattern B1: | _oita trinita 2023 HOME FP |
| Pattern Ra1: | _oita trinita 2023 HOME FP |
| Pattern Sh1: | _oita trinita 2023 HOME FP |
| Pattern So1: | _oita trinita 2023 HOME FP |
| Pattern La2: | _oita trinita 2023 AWAY FP |
| Pattern B2: | _oita trinita 2023 AWAY FP |
| Pattern Ra2: | _oita trinita 2023 AWAY FP |
| Pattern Sh2: | _oita trinita 2023 AWAY FP |
| Pattern So2: | _oita trinita 2022 AWAY FP |
| Updated: | 17 May 2023 |
| Prevseason: | 2022 |
| Nextseason: | 2024 |
The 2023 season is Oita Trinita's 29th season in existence and the club's second consecutive season in the second division of Japanese football. In addition to the domestic league, Oita Trinita will participate in this season's edition of the Emperor's Cup.
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See main article: 2023 J2 League.
The league fixtures were announced on 20 January 2023.[2]
See main article: 2023 Emperor's Cup.