  The discovery of two neutron star-black hole coalescences by LIGO and Virgo
brings the total number of likely neutron stars observed in gravitational waves
to six. We perform the first inference of the mass distribution of this
extragalactic population of neutron stars. In contrast to the bimodal Galactic
population detected primarily as radio pulsars, the masses of neutron stars in
gravitational-wave binaries are thus far consistent with a uniform
distribution, with a greater prevalence of high-mass neutron stars. The maximum
mass in the gravitational-wave population agrees with that inferred from the
neutron stars in our Galaxy and with expectations from dense matter.
