Camouflaging in autism spectrum disorder could be a factor in later diagnosis of individuals without co-occurring intellectual disability, particularly among those designated female sex at birth. Little research to date has examined how gender identity impacts camouflaging, however. Further, no study has compared groups that differ in diagnostic timing to directly investigate if later-diagnosed individuals demonstrate elevated camouflaging relative to those receiving an earlier diagnosis. Using the Camouflaging Autistic Traits Questionnaire subscales (Assimilation, Compensation, and Masking), we investigated the roles of sex, gender identity (gender diverse vs cisgender), and diagnostic timing (childhood/adolescent-diagnosed vs adult-diagnosed), and the interactions of these factors, in autistic adults (N = 502; age 18-49 years). Main effects of sex, gender identity, and diagnostic timing were revealed. Autistic females reported more camouflaging across Camouflaging Autistic Traits Questionnaire subscales compared to males. Gender diverse adults reported elevated camouflaging on the Compensation subscale compared to cisgender adults. Adulthood-diagnosed individuals reported elevated Assimilation and Compensation compared to childhood/adolescence-diagnosed individuals. We discuss how aspects of camouflaging may have particular implications for later diagnostic timing and for the intersection of neurodiversity and gender diversity.