Although sexual and reproductive health is critically important for women with intellectual and developmental disabilities (IDD), there is limited research elucidating the role of family caregivers in assisting women with IDD access sexual and reproductive health services and information. Understanding the family caregivers' attitudes and perspectives is essential to improving access to sexual and reproductive health services and information for women with IDD. A cross-sectional online survey of family caregivers of women with IDD was administered between June and October 2018. Quantitative analysis was conducted for closed-ended responses, and qualitative analysis was conducted for open-ended responses. The analytic sample included 132 family caregivers. Most participants were parents and reported being closely involved in their family member's access to sexual and reproductive health services and information. Although most participants expressed that sexual and reproductive health services and information are essential for women with IDD, qualitative analysis of participants' open-ended responses revealed both supportive and restrictive attitudes and perspectives on sexual and reproductive health services and information for women with IDD. Supportive attitudes and perspectives included (1) "knowledge is power;" (2) supported decision-making; and (3) protection against sexual abuse. Restrictive attitudes and perspectives included (1) dependent on the individual; (2) lack of autonomy; and (3) placing responsibility on disability. Greater attention from policymakers and practitioners to systems-level changes, including universal and accessible sexual education for women with IDD, supported decision-making, and sexual abuse prevention measures, are urgently needed.