The Collection of Problems in Theoretical Physics presents problems in the course of theoretical physics: classical mechanics, electrodynamics, non-relativistic quantum mechanics, statistical physics and thermodynamics. Each section of this collection is preceded by a summary of the basic laws and ratios used to solve the problems contained in it, as well as information about the necessary mathematical apparatus. At the end of the collection, answers are given and methods for solving more complex problems are indicated. Tasks are given in the International System of SI Units.