Nucleon Structure and Soft QCD from CMS

Recent results on nucleon structure, and measurements of soft and small-x QCD and diffractive processes, performed with the CMS and TOTEM experiments, are presented. The results are compared to theoretical predictions, as implemented in various Monte Carlo simulations, as well as to other measurements. These studies are useful to test predictions based on perturbative and non-perturbative QCD techniques and provide valuable input for tuning of Monte Carlo event generators.