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The Linguistic Inquiry and Word Count (LIWC) is a popular closed-vocabulary text analysis software program that is used to understand whether individuals’ use of linguistic categories (ie, word categories, such as negative affect) depends on their personality traits. Here, we present the first meta-analysis of the relations between the Big Five personality traits and 52 linguistic categories of the English language. Across 31 eligible samples (n= 85,724), the results showed that (a) self-reported personality traits are significantly correlated with linguistic categories, but the effect sizes are relatively small (the strongest effect sizes between the Big Five and linguistic categories ranged from| ρ|=. 08 to. 14, and the 52 LIWC categories explained on average 5.1% of personality variance);(b) observer-reported personality traits are significantly correlated with linguistic categories, with the effect sizes being small-to-medium (| ρ …