| Club: | CA Osasuna |
| Season: | 2015–16 |
| Chrtitle: | President |
| Chairman: | Luis Sabalza |
| Mgrtitle: | Head coach |
| Manager: | Enrique Martín |
| Stadium: | El Sadar |
| League: | Segunda División |
| League Result: | 6th (promoted via play-offs) |
| Cup1: | Copa del Rey |
| Cup1 Result: | Second round |
| Pattern La1: | _osasuna1516home |
| Pattern B1: | _osasuna1516h |
| Pattern Ra1: | _osasuna1516h |
| Pattern Sh1: | _osasuna1516h |
| Pattern So1: | _osasuna1516h |
| Leftarm1: | 000000 |
| Body1: | 000000 |
| Rightarm1: | 000000 |
| Shorts1: | 000040 |
| Socks1: | 000040 |
| Pattern La2: | _caosasuna1516 |
| Pattern B2: | _caosasuna1516a |
| Pattern Ra2: | _caosasuna1516a |
| Pattern Sh2: | _caosasuna1516a |
| Pattern So2: | _caosasuna1516a |
| Leftarm2: | FFFFFF |
| Body2: | FFFFFF |
| Rightarm2: | FFFFFF |
| Shorts2: | FFA500 |
| Socks2: | FFFFFF |
| Prevseason: | 2014–15 |
| Nextseason: | 2016–17 |
The 2015–16 season was the 96th season in the existence of CA Osasuna and the club's second consecutive season in the second division of Spanish football. In addition to the domestic league, CA Osasuna participated in this season's edition of the Copa del Rey.
See main article: 2015–16 Segunda División.
The league fixtures were announced on 14 July 2015.[2]
See main article: 2015–16 Copa del Rey.