This research examines electronic commerce participation and attitudes by older Americans. Questionnaires were distributed at a large retirement community and several senior centers located in Pennsylvania. The sample of 110 respondents ranged in age from 52 to 87. Fifty-nine percent reported purchasing an item online in the last 6 months. The Technology Acceptance Model (TAM) was used and modified to examine the impact attitudes concerning ease of use, usefulness and trust had on electronic commerce usage. Usefulness and trust were found to have a positive, direct affect on usage. Ease of use had significant impacts on usefulness and trust had a significant impact on both ease of use and usefulness. The chapter concludes with a discussion of these results, study limitations, and directions for future research.