  The mass of the top quark is a fundamental parameter of the standard model
and has to be determined experimentally. In these proceedings, I review recent
measurements of the top quark mass in $pp$ collisions at $\sqrt s=7,~8,$ and 13
TeV recorded by the ATLAS and CMS detectors at the LHC, and in $p\bar p$
collisions at $\sqrt s=1.96$ TeV recorded by the CDF and D0 experiments at the
Tevatron. The measurements are performed in final states containing two, one,
and no charged leptons. A relative precision of down to 0.3% is attained. In
addition, recent measurements aiming to determine the top quark mass in the
well-defined pole scheme using both inclusive $t\bar t$ and $t\bar t+1~{\rm
jet}$ production are presented.
