  We present an X-ray point-source catalog from the XMM-Large Scale Structure
survey region (XMM-LSS), one of the XMM-Spitzer Extragalactic Representative
Volume Survey (XMM-SERVS) fields. We target the XMM-LSS region with $1.3$ Ms of
new XMM-Newton AO-15 observations, transforming the archival X-ray coverage in
this region into a 5.3 deg$^2$ contiguous field with uniform X-ray coverage
totaling $2.7$ Ms of flare-filtered exposure, with a $46$ ks median PN exposure
time. We provide an X-ray catalog of 5242 sources detected in the soft (0.5-2
keV), hard (2-10 keV), and/or full (0.5-10 keV) bands with a 1% expected
spurious fraction determined from simulations. A total of 2381 new X-ray
sources are detected compared to previous source catalogs in the same area. Our
survey has flux limits of $1.7\times10^{-15}$, $1.3\times10^{-14}$, and
$6.5\times10^{-15}$ erg cm$^{-2}$ s$^{-1}$ over 90% of its area in the soft,
hard, and full bands, respectively, which is comparable to those of the
XMM-COSMOS survey. We identify multiwavelength counterpart candidates for 99.9%
of the X-ray sources, of which 93% are considered as reliable based on their
matching likelihood ratios. The reliabilities of these high-likelihood-ratio
counterparts are further confirmed to be $\approx 97$% reliable based on deep
Chandra coverage over $\approx 5$% of the XMM-LSS region. Results of
multiwavelength identifications are also included in the source catalog, along
with basic optical-to-infrared photometry and spectroscopic redshifts from
publicly available surveys. We compute photometric redshifts for X-ray sources
in 4.5 deg$^2$ of our field where forced-aperture multi-band photometry is
available; $>70$% of the X-ray sources in this subfield have either
spectroscopic or high-quality photometric redshifts.
