Jet physics measurements at CMS We present CMS results related to jet production cross sections, which pose a central test to perturbative QCD predictions and which place an important constraint on parton distribution functions and the strong coupling constant. Results include recent measurements performed with 2011 data taken at center-of-mass energy of 7 TeV and 2012 data taken at 8 TeV. We also review the early 2013 measurements on dijet production in p-Pb collisions taken at nucleon center-of-mass energy of 5.02 TeV.