  Testing the Yukawa couplings of the Higgs boson to quarks and leptons is
important to understand the origin of fermion masses. These proceedings will
review several measurements of Higgs boson decays to two bottom quarks or two
tau leptons, searches for Higgs boson decays to two charm quarks or two muons,
as well as direct constraints on the charm-Yukawa coupling. The production of
Higgs boson in association with top quarks will also be discussed. These
analyses are based on 139 fb$^{-1}$ of Run-2 data from proton-proton collisions
collected by the ATLAS experiment at the Large Hadron Collider (LHC) with a
center-of-mass energy of 13 TeV.
