After a short introduction to (jet) physics at HERA, recent results on DIS jet physics from the HERA collaborations H1 and ZEUS are reviewed. Topics covered are, among others, multi-jet cross-section measurements, determinations of the strong coupling parameter aS and the gluon density and jet measurements at the highest photon virtualities Q2 accessible at HERA. It is shown that over a wide range of phase-space NLO QCD calculations deliver a satisfactory description of the data. The
determinations of aS using jets at HERA have achieved a precision similar to the world average.