  In this Letter, we present five analytical models in closed forms, each
representing a supermassive black hole (SMBH) located at the center of a galaxy
surrounded by dark matter (DM) halo. The density profile of the halo vanishes
inside twice the Schwarzschild radius of the hole and satisfies the weak,
strong, and dominant energy conditions. The spacetime are asymptotically flat,
and the difference among the models lies in the slopes of the density profiles
in the spike and regions far from the center of the galaxy. Three of them
represent cusp models, whereas the other two represent core models. With the
well-known (generalized) Newman-Janis algorithm, rotating SMBHs with DM halos
can be easily constructed from these models.
