  Despite the absence of a lightcone structure, some solutions of Carroll
gravity show black hole-like behaviour. We define Carroll black holes as
solutions of Carroll gravity that exhibit Carroll thermal properties and have a
Carroll extremal surface, notions introduced in our work. The latter is a
Carroll analogue of a Lorentzian extremal surface. As examples, we discuss the
Carroll versions of Schwarzschild, Reissner-Nordstroem, and BTZ black holes and
black hole solutions of generic 1+1 dimensional Carroll dilaton gravity,
including Carroll JT and Carroll Witten black holes.
