PASCOS 2025, the 30th International Symposium on Particles, Strings and Cosmology, will take place on July 21-25, 2025 in Durham. The aim of the conference is to review recent progress in particle physics, astroparticle physics, string theory and cosmology, with particular emphasis on their interconnections. Topics to be covered include: LHC Physics and theoretical status, Dark Matter and Dark Energy, String theory methods and string phenomenology, Neutrino physics, Precision measurements and non-accelerator probes of new physics, Inflation and alternatives, Gravitational waves among others.