  This is the second of two papers describing the observations and source
catalogues derived from sensitive 3-GHz images of the Lockman Hole North using
the Karl G. Jansky Very Large Array. We describe the reduction and cataloguing
process, which yielded an image with 8 arcsec resolution and instrumental noise
of \sigma$_{\rm n}$=1.0 \mu Jy beam$^{-1}$ rms (before primary beam
corrections) and a catalogue of 558 sources detected above 5\sigma$_{\rm n}$.
We include details of how we estimate source spectral indices across the 2-GHz
VLA bandwidth, finding a median index of -0.76$\pm$0.04. Stacking of source
spectra reveals a flattening of spectral index with decreasing flux density. We
present a source count derived from the catalogue. We show a traditional count
estimate compared with a completely independent estimate made via a P(D)
confusion analysis, and find very good agreement. Cross-matches of the
catalogue with X-ray, optical, infrared, radio, and redshift catalogues are
also presented. The X-ray, optical and infrared data, as well as AGN selection
criteria allow us to classify 10 per cent as radio-loud AGN, 28 percent as
radio-quiet AGN, and 58 per cent as star-forming galaxies, with only 4 per cent
unclassified.
