The use of telehealth in behavioral healthcare increased significantly since the start of the COVID-19 pandemic and remains high even as a return to in-person care is now feasible. The use of telehealth is a promising strategy to increase access to behavioral healthcare for underserved and all populations. Identifying opportunities to improve the provision of telehealth is vital to ensuring access. An online survey about the current use of, and attitudes toward, telehealth was conducted by five Mental Health Technology Transfer Center (MHTTC) regional centers and the MHTTC Network Coordinating Office. The national MHTTC network provides training and technical assistance, to support the behavioral health workforce to implement evidence-based treatments. Three hundred and sixty-five respondents from 43 states and Puerto Rico participated. The majority of respondents were clinical providers (69.3%). Nearly all (n = 311) respondents reported providing at least one telehealth service at their organization, but the number and type of services varied substantially. Respondents had positive views of both video-based and phone-based services, but most had some preference for video-based telehealth services. Other services, including text message reminders, medication services, and mobile apps for treatment or recovery, were offered via telehealth by ~ 50% or fewer of respondents’ organizations. Many organizations have areas where they could expand their telehealth use, allowing them to extend the reach of their services and increase access for populations that experience barriers to service access, though organizational barriers may still prevent this.