  We construct black hole solutions to three-dimensional Einstein-Maxwell
theory with both gravitational and electromagnetic Chern-Simons terms. These
intrinsically rotating solutions are geodesically complete, and causally
regular within a certain parameter range. Their mass, angular momentum and
entropy are found to satisfy the first law of black hole thermodynamics. These
Chern-Simons black holes admit a four-parameter local isometry algebra, which
generically is $sl(2,R)\times R$, and may be generated from the corresponding
vacua by local coordinate transformations.
