  The mass of the top quark (\mtop) is a fundamental parameter of the standard
model (SM). Currently, its most precise measurements are performed by the CDF
and D0 collaborations at the Fermilab Tevatron $p\bar p$ collider at a
centre-of-mass energy of $\sqrt s=1.96 \TeV$. We review the most recent of
those measurements, performed on data samples of up to 8.7 \fb\ of integrated
luminosity. The Tevatron combination using up to 5.8 fb$^{-1}$ of data results
in a preliminary world average top quark mass of $m_{\rm top} = 173.2 \pm 0.9$
GeV. This corresponds to a relative precision of about 0.54%. We conclude with
an outlook of anticipated precision the final measurement of \mtop at the
Tevatron.
