This study examined the relationship between trauma, ego functioning, and internet addiction. We recruited 323 participants via Amazon Mechanical Turk, a crowdsourcing platform that can be used for survey research. We gave participants the Internet Addiction Test, the Life Events Checklist, the Ego Function Assessment questionnaire, and a demographic questionnaire. Our results indicate that 41.5% reported no internet addiction, with the majority of our sample reporting behaviors that were consistent with internet addiction: mild internet addiction = 37.8%, moderate internet addiction = 19.8%, and severe internet addiction = 0.9%. The constrictive factor of ego functioning was significantly worse in those with internet addiction. Path analysis showed that the constrictive factor of ego functioning partially mediated the relationship between a self-reported history of trauma and the presence of self-reported internet addiction.