Without Oshoala, Lluis Cortes ladies continued their winning form at Estadio La Palmera as Bruna Vilamala s lone effort in the first half was enough for the visitors to clinch their 26th win of the term.
The result means Barcelona hold a 16-point lead over second-placed Levante with three games in hand, having garnered 78 points from 26 games and scored 128 goals while only conceding five.
Besides retaining the title, they also remain unbeaten in the league since February 2019, and this is their sixth league diadem of all time.
For Oshoala, it will be the second time that she has won the league title with Barcelona, having previously starred in their 2019-20 triumph, where she scored 20 goals in 19 games.