The Internet opens new options for communication and may change the extent to which older people use other modes of communication. The importance of older adults' participation in cyberspace has increased as Internet use for commerce and communication has increased. The present study explores how older adults' Internet use affects their sense of community. An online survey was conducted at the University of Sydney to determine the associations between Internet use and seniors' sense of community and well-being. Participants were recruited online. There was a positive association between a sense of belonging to an online community, sense of community, and well-being. Seniors' use of the Internet for communication and information, and the frequency and history of their Internet use, were consistently related to a greater sense of community.