BACKGROUND With the proliferation of the internet and the development of internet-based healthcare interventions, eHealth is expected to be an effective complement to traditional healthcare services. However, without understanding the characteristics of the user population, eHealth itself can isolate older adults. OBJECTIVE This study aims to identify the characteristics of internet use and the factors associated with eHealth use among older adults. METHODS A secondary data analysis was conducted from a cross-sectional descriptive study. A convenience sample of 186 community dwelling older adults was recruited at two senior welfare centres in Korea. The data collected included demographic characteristics, health related characteristics, internet use, eHealth use and eHealth literacy. Multiple linear regression was utilized to determine factors related to eHealth use. RESULTS Among 186 respondents, 98 reported that they used the internet. Internet usage was associated with educational attainment, marital status, cognitive function and possession of internet-enabled devices. The results of multiple regression analysis showed that greater eHealth usage was related to more positive perception of eHealth usability and better eHealth literacy among older adults. CONCLUSIONS Educational programmes for older adults should be developed to facilitate digital capability and eHealth literacy. Useful and effective online health resources that are easy to use should be also developed.