This volume collects selected papers from the Tenth High Dimensional Probability conference, held from June 12 to 16, 2023 in Bedlewo, Poland. These papers cover a wide range of topics and demonstrate how high-dimensional probability remains an active area of research with applications across many mathematical disciplines. Topics covered include:The Gram-Schmidt walk algorithm;Variance bounds;Random interlacements;Contraction theorems on the half-space. High Dimensional Probability X will be a valuable resource for researchers in this area.