This review article discusses the current status of particle dark matter, including experimental evidence and theoretical motivations. It covers a wide range of candidates for particle dark matter, focusing on neutralinos in supersymmetry models and Kaluza-Klein dark matter in universal extra dimension models. The article delves into direct and indirect detection techniques, the constraints placed by these experiments, and the reach of future experimental efforts. The review also provides an overview of the Standard Model of particle physics and cosmology, the history of the universe, and the calculation of relic density. It examines compelling evidence for dark matter at various astrophysical scales, including galactic, cluster, and cosmological scales. The article discusses the distribution of dark matter in galaxies, the role of the galactic center, and the presence of supermassive black holes. It reviews the candidates for dark matter, such as non-baryonic candidates, supersymmetry, extra dimensions, and superheavy candidates, along with collider constraints. The review also covers existing and next-generation experiments that will probe the nature of dark matter, including direct detection experiments, gamma-ray experiments, neutrino telescopes, positron and anti-proton experiments, and observations at radio wavelengths. The article concludes with a discussion of indirect detection methods, such as gamma-rays, neutrinos, synchrotron radiation, annihilation radiation, high-energy neutrinos, and positrons and anti-protons from annihilations in the galactic halo. It also addresses the role of substructures, constraints from helioseismology, and constraints on superheavy dark matter.This review article discusses the current status of particle dark matter, including experimental evidence and theoretical motivations. It covers a wide range of candidates for particle dark matter, focusing on neutralinos in supersymmetry models and Kaluza-Klein dark matter in universal extra dimension models. The article delves into direct and indirect detection techniques, the constraints placed by these experiments, and the reach of future experimental efforts. The review also provides an overview of the Standard Model of particle physics and cosmology, the history of the universe, and the calculation of relic density. It examines compelling evidence for dark matter at various astrophysical scales, including galactic, cluster, and cosmological scales. The article discusses the distribution of dark matter in galaxies, the role of the galactic center, and the presence of supermassive black holes. It reviews the candidates for dark matter, such as non-baryonic candidates, supersymmetry, extra dimensions, and superheavy candidates, along with collider constraints. The review also covers existing and next-generation experiments that will probe the nature of dark matter, including direct detection experiments, gamma-ray experiments, neutrino telescopes, positron and anti-proton experiments, and observations at radio wavelengths. The article concludes with a discussion of indirect detection methods, such as gamma-rays, neutrinos, synchrotron radiation, annihilation radiation, high-energy neutrinos, and positrons and anti-protons from annihilations in the galactic halo. It also addresses the role of substructures, constraints from helioseismology, and constraints on superheavy dark matter.