Purpose Social isolation is linked to cognitive decline and depression, which can be risk factors for developing dementia. The purpose of this study was to determine which of a variety of factors were associated with communicative participation as measured by social network size. Method Three hundred thirty-seven adults aged 65 years or older were administered assessments to evaluate social network size, cognition, hearing handicap, and quality of communicative participation. Results Cognition, education, living setting, and quality of communication life were associated to varying degrees with the construct of communicative participation as measured by social network size. Conclusion Assessment of these variables, along with early identification of cognitive decline, could play an important role in identifying elderly individuals at risk for limitations in communicative participation and associated consequences.