<p>Kinematics is central to nearly all design aspects of robotic/mechatronic systems.</p><p>The series of Special Issues on Kinematics and Robot Design (KaRD) offers to the vast community of scientists of this field a virtual agora where new ideas and new applications can be presented and discussed.</p><p>The KaRD series started in 2018 and in 2023 reached its sixth edition (KaRD2023). KaRD2023 has collected fifteen submissions and after a rigorous review process accepted and published ten papers.</p><p>This reprint collects KaRD2023's published papers.</p>