  I review the status of lattice-QCD calculations relevant to quark flavor
physics. The recent availability of physical-mass ensembles with large physical
volumes generated by a growing number of lattice collaborations is an exciting
development and I discuss their impact on the landscape of lattice flavor
physics calculations. The activities of the newly formed FLAG-2 collaboration
which provides averages of quantities calculated in lattice QCD that are
relevant for quark flavor physics are also discussed. My talk covers (a subset
of) the same quantities reviewed by FLAG-2, including results for $K$,
$D_{(s)}$, and $B_{(s)}$ meson decay constants and semileptonic decay form
factors, as well as for hadronic matrix elements of neutral ($K$, $D$, and
$B_{(s)}$) meson mixing. I also briefly discuss recent progress towards
understanding nonleptonic $K$ decay and long-distance contributions to $\Delta
m_K$.
