  We present a catalog of compact sources of radio emission at 1420 MHz in the
northern Galactic plane from the Canadian Galactic Plane Survey. The catalog
contains 72,787 compact sources with angular size less than 3$'$ within the
Galactic longitude range $52^{\circ} < \ell < 192^{\circ}$ down to a 5$\sigma$
detection level of $\sim$1.2 mJy. Linear polarization properties are included
for 12,368 sources with signals greater than 4$\sigma_{QU}$ in the CGPS Stokes
$Q$ and $U$ images at the position of the total intensity peak. We compare CGPS
flux densities with cataloged flux densities in the Northern VLA Sky Survey
catalog for 10,897 isolated unresolved sources with CGPS flux density greater
than 4 mJy to search for sources that show variable flux density on time scales
of several years. We identify 146 candidate variables that exhibit high
fractional variations between the two surveys. In addition we identify 13
candidate transient sources that have CGPS flux density above 10\,mJy but are
not detected in the NVSS.
