A salient question in the digital era is whether new forms of digital communication (e.g., instant messages, video calls, e-mails) have displaced or reinforced more traditional forms of communication (e.g., meeting face-to-face, contact by phone, sending letters/postcards). These opposing hypotheses, i.e., digital communication as a reinforcer versus a displacer, have attracted abundant attention among scholars; however, studies have scarcely explored these hypotheses in the context of communication among kin. Using large-scale and population-based data of 1,945 young to middle-aged (18–55 year-olds) and 2,663 older (68–73 year-olds) Finns, we tested the predictions derived from the displacement and reinforcement hypotheses in several kin dyads (parent-child, grandparent-grandchild, siblings, and aunt/uncle-niece/nephew). The results strongly supported the reinforcement hypothesis in all kin dyads, and in both younger and older adults. Associations were positive even after controlling for a wide range of potentially confounding factors. Hence, it can be concluded that digital means may reinforce rather than displace traditional forms of contact.