This secondary analysis examined the impact of respondent-level factors on scores on the "Supports Intensity Scale--Children's Version" (SIS-C) for children and youth with intellectual disability to determine if there were any significant differences in the SIS-C scores by different respondent pairs when considering children's age, intellectual functioning level, and adaptive behavior level. Results indicated whenever a pair of respondents included a teacher or a paraprofessional, the support needs scores were lower than when the pair included a family member. Moreover, there was a significant interaction effect across respondent pairing, child age, and child intellectual functioning levels as well as across respondent pairing, child age, and child adaptive behavior levels. Implications for administration and use of the SIS-C are provided.