  We present the first complete calculation of Z-boson production in
association with a jet in hadronic collisions through next-to-next-to-leading
order in perturbative QCD. Our computation uses the recently-proposed
N-jettiness subtraction scheme to regulate the infrared divergences that appear
in the real-emission contributions. We present phenomenological results for 13
TeV proton-proton collisions with fully realistic fiducial cuts on the
final-state particles. The remaining theoretical uncertainties after the
inclusion of our calculations are at the percent-level, making the Z+jet
channel ready for precision studies at the LHC Run II.
