Yes, you can usually claim Child Benefit if you are responsible for a qualifying child, whether or not they have a disability. The child’s disability does not normally change the Child Benefit amount, and Child Benefit is separate from Disability Living Allowance (DLA) for children, which requires a separate claim. If you mean claiming Child Benefit for yourself because you have a disability, it is not normally payable for an adult. Check the latest rules and application process on GOV.UK, as eligibility depends on your circumstances.