Background: Whilst research into the wide-ranging needs of family members following traumatic brain injury (TBI) is well established, investigation into the specific needs of families in relation to supporting cognitive-communication difficulties, relationships and social participation is limited. Aims: To identify the family needs for cognitive-communication difficulties following TBI and to explore whether current services are meeting these needs. Methods & Procedures: Following a successful pilot, family members from the UK and Australia were invited via posters, social media and e-mail to take part in an anonymous, communication needs survey. Data arising from the thirty two closed questions (six eligibility, nine demographic and seventeen needs questions) were analysed using SPSS descriptive statistics. Data arising from one open question were analysed using qualitative content analysis. Outcomes & Results: A total of 102 family members from the UK (n = 89, 87%) and Australia (n = 13, 13%) completed the survey. The majority of respondents were female (n = 76; 75%), between the ages of 30 and 69 (n = 88; 87%), and either a parent or a partner of the person following TBI (n = 78;76%). Respondents rated information about expected recovery from cognitive-communication difficulties and training in helpful strategies as their most important needs. The majority of respondents (more than 60%) were not satisfied that any of their cognitive-communication needs had been fully met and high levels of unmet need remained evident at three years or more post-injury. Written information, communication partner training and counselling were identified as key supports. Conclusions & Implications: Families report high levels of unmet need for managing cognitive-communication difficulties following TBI. Access to written information and communication partner training should be available to families at various time points following TBI and not just in the early stages.