PurposeGiven its importance, career optimism (CO) has drawn much attention from researchers. Fruitful evidence has been accumulated; unfortunately, a quantitative review is still lacking, which would limit the continuous development of this field. To address this, this paper uses the meta-analysis technology to evaluate the links between CO and its antecedents and outcomes.Design/methodology/approachThis study used Hunter–Schmidt method random effect meta-analysis technology to systematically evaluate the true score correlations between CO and its antecedents and outcomes.FindingsAmong the CO antecedents, this study found significant links between CO and agreeableness (ρ = 0.11), career adaptability (ρ = 0.55), career knowledge (ρ = 0.43), career decision self-efficacy (ρ = 0.52), social support (ρ = 0.30), conscientiousness (ρ = 0.54), extraversion (ρ = 0.38), gender (ρ = 0.07), GPA (ρ = 0.11), neuroticism (ρ = −0.42), and openness (ρ = 0.27). Moreover, among the CO outcomes, significant links have been found between CO and academic satisfaction (ρ = 0.43), career choice satisfaction (ρ = 0.44), career decisiveness (ρ = 0.37), depersonalization (ρ = −0.48), and emotional exhaustion (ρ = −0.59).Originality/valueBy conducting the first meta-analysis of CO, our study contributes to the CO literature. Additionally, our study increases the knowledge of CO, which would help leaders in the school or workplace to understand the significance of CO better and thereby take actions to intervene and increase students or employees' CO.