  Here we report the observation of bulk superconductivity in single crystals
of the two-dimensional kagome metal KV$_3$Sb$_5$. Magnetic susceptibility,
resistivity, and heat capacity measurements reveal superconductivity below $T_c
= 0.93$K, and density functional theory (DFT) calculations further characterize
the normal state as a $\mathbb{Z}_2$ topological metal. Our results demonstrate
that the recent observation of superconductivity within the related kagome
metal CsV$_3$Sb$_5$ is likely a common feature across the AV$_3$Sb$_5$ (A: K,
Rb, Cs) family of compounds and establish them as a rich arena for studying the
interplay between bulk superconductivity, topological surface states, and
likely electronic density wave order in an exfoliable kagome lattice.
