<p>Spatiotemporal resolution is a cornerstone of bioelectronics, enabling precise observation and control of biological events at the molecular, cellular and tissue levels. In this Review, we analyse recent advancements in spatiotemporal resolution essential for applications such as neuroprosthetics, cardiac monitoring and biosensing, with a focus on devices utilizing electrical, electrochemical and optoelectronic signal transduction. We define the intrinsic and extrinsic parameters of spatial and temporal resolution and highlight high-performance materials and device architectures — including electrodes, transistors and optoelectronic interfaces — that drive these capabilities. Strategies such as device miniaturization, 3D fabrication and multifunctional integration are evaluated for their capacity to improve resolution, particularly within the complex microenvironments of biological tissues. However, challenges persist, including signal interference, device stability and the demand for reliable long-term operation. Overcoming these obstacles requires continuous innovation in materials science, device engineering and computational approaches. Enhanced spatiotemporal resolution holds promise for advancing diagnostic precision, therapeutic responsiveness and our understanding of dynamic biological systems across biomedical disciplines.</p>