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We utilize a new VLA Galactic plane catalog at 1.4 GHz covering the first andsecond Galactic quadrants (340 deg <l< 120 deg, |b|<0.8 deg with |b|< 1.8 degfor 350 deg <l< 40 deg and |b|<2.5 deg for 100 deg <l<105 deg) in conjunctionwith the MSX6C Galactic plane mid-infrared catalog to supplement and betterunderstand our 5 GHz catalog (Giveon et al. 2005). A radio catalog of thisregion was first published by Zoonematkermani et al. (1990), but we havere-reduced the data with significantly improved calibration and mosaicingprocedures, resulting in more than a tripling of the number of 1.4 GHz sourcesdetected. Comparison of the new 1.4 GHz catalog and the MSX6C catalog resultedin a sample of 556 matches, out of which we estimate only 11 to be chancecoincidences. Most of the matches show red MSX colors. The scale height oftheir Galactic latitude distribution is 24'-28' (FWHM) or ~60-70 pc (for adistance of 8.5 kpc), depending on longitude. The latitude distributionflattens out significantly above l~40 deg and the number of matches drops offsharply.Comment: Accepted to the Astronomical Journal. Paper #2 in a series (1st paper  - astro-ph/0410052). Catalog (Table 4) available when downloaded as 'source

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