  We present a catalog of radio-loud candidate gamma-ray emitting blazars with
WISE mid-infrared colors similar to the colors of confirmed gamma-ray blazars.
The catalog is assembled from WISE sources detected in all four WISE filters,
with colors compatible with the three-dimensional locus of the WISE gamma-ray
emitting blazars, and which can be spatially cross-matched with radio sources
from either one of the three radio surveys: NVSS, FIRST and/or SUMSS. Our
initial WISE selection uses a slightly modified version of previously
successful algorithms. We then select only the radio-loud sources using a
measure of the radio-to-IR flux, the q22 parameter, which is analogous to the
q24 parameter known in the literature but which instead uses the WISE band-four
flux at 22 micron. Our final catalog contains 7855 sources classified as BL
Lacs, FSRQs or mixed candidate blazars; 1295 of these sources can be spatially
re-associated with confirmed blazars. We describe the properties of the final
catalog of WISE blazar-like radio-loud sources and consider possible
contaminants. Finally, we discuss why this large catalog of candidate gamma-ray
emitting blazars represents a new and useful resource to address the problem of
finding low energy counterparts to currently unidentified high-energy sources.
