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PURPOSE To translate the ACTIVLIM-CP questionnaire, developed to assess global activity performance in children with Cerebral Palsy (CP), into Turkish and to investigate its psychometric properties. METHODS Eighty-nine children with CP, aged between 2 and 18 years (mean age: 10.08 ± 4.94 years), were included in the study. Internal consistency was measured by Cronbach's alpha and test-retest reliability was assessed using intraclass correlation coefficient (ICC). Convergent validity was evaluated through the pattern of correlations between the ACTIVLIM-CP with PEDI, ABILOCO-Kids, ABILHAND-Kids, and Wee-FIM scores. Known-group comparisons were made according to epilepsy existence and ambulation level measured by Gross Motor Function Classification System (GMFCS). RESULTS Internal consistency was excellent (Cronbach's α = 0.990), and the ICC for the test-retest reliability was 0.990. There was a very strong correlation between ACTIVLIM-CP and ABILHAND-Kids (r = 0.946), WeeFIM (r = 0.900), PEDI Functional Skills and Caregiver Assistance scores (r = 0.954, r = 0.937, respectively), and ABILOCO-Kids (r = 0.817) (p < 0.001) score. ACTIVLIM-CP score was lower in children with epilepsy (p = 0.001) and in the high-level group according to GMFCS (p < 0.001). CONCLUSION The Turkish adaptation of ACTIVLIM-CP is a valid and reliable scale for measuring activity limitations in children with CP and is compatible with other scales evaluating activity limitations. CLINICAL TRIAL NUMBER NCT05184244IMPLICATIONS FOR REHABILITATIONActivity limitation measurements are crucial and necessary to determine the global activity performance of children with CP.ACTIVLIM-CP was translated and culturally adapted to Turkish and showed good psychometric properties.ACTIVLIM-CP is a valid and reliable tool to evaluate activity performance in children with CP.