Background: High anxiety levels are common in people with intellectual disabilities (ID) and anxiety can affect sport performance, but sport competitive anxiety profiles in athletes with ID are unknown. Methods: A total of 303 athletes; 116 with ID (33% female, M age = 22.64, SD = 3.94), and 187 without ID (54% female, M age = 21.81, SD = 3.23), completed the modified questionnaire Sport Anxiety Scale-2-FLemish-ID (SAS-2-FL-ID). Results: The SAS-2-FL-ID was a valid tool to use in a population of athletes with ID. They had higher trait anxiety (9.36 ± 2.62) than peers without ID (7.58 ± 2.44), F = 26.95, p<0.001. With respect to sport anxiety, they only scored higher on the "concentration disruption" subscale. Their overall level of competitive anxiety across all subscales (24.14 ± 7.73) was significantly lower compared to athletes without ID (26.51 ± 7.49), F = 27.10, p<0.001. Conclusion: On the sporting field, athletes with ID worry less and feel less somatic anxiety compared to athletes without ID.