Higgs boson measurements performed by ATLAS with data collected in LHC Run 2 have been combined, resulting in a precise set of measurements of Higgs boson properties. Results are found to be consistent with the expectations of the Standard Model, and limits are set in a variety of BSM scenarios. These results extend those from an earlier Higgs boson combination, which did not include data collected in 2018, to use the full LHC Run 2 dataset for the H→γγ, H→ZZ→4l, H→µµ, V(lep)H→bb, and VBF H→inv production modes and decays.