Bipolar disorder is a highly disruptive and debilitating problem. Mindfulness‐based and mindfulness‐informed interventions have exponentially emerged as third‐generation therapies, applied to a wide spectrum of disorders, including bipolar disorder. However, the reviews and meta‐analyses published to date are limited in their conclusions, as they are based on single‐group pretest–posttest cohort designs and mostly focused on mindfulness‐based interventions. The present review and meta‐analysis try to address these limitations, including studies on informed mindfulness, controlled and single‐group designs. It used a specific meta‐analytical procedure that allows an imputation procedure in those designs lacking a comparison group, by means of separate omnibus tests for the experimental and control group. A total of 13 studies (N = 331) were selected. The results showed an absence of effects on depression (g = 0.21) and mania (g = −0.13), but significant moderate effect on anxiety (g = 0.53). In conclusion, both mindfulness interventions showed robust evidence on anxiety symptoms in pretest–posttest periods compared to control groups. Few studies and lack of evidence of follow‐up periods were the main limitations found.