  We present the new parton distribution functions (PDFs) from the CTEQ-TEA
collaboration, obtained using a wide variety of high-precision Large Hadron
Collider (LHC) data, in addition to the combined HERA I+II deep-inelastic
scattering data set, along with the data sets present in the CT14 global QCD
analysis. New LHC measurements in single-inclusive jet production with the full
rapidity coverage, as well as production of Drell-Yan pairs, top-quark pairs,
and high-$p_T$ $Z$ bosons, are included to achieve the greatest sensitivity to
the PDFs. The parton distributions are determined at NLO and NNLO, with each of
these PDFs accompanied by error sets determined using the Hessian method. Fast
PDF survey techniques, based on the Hessian representation and the Lagrange
Multiplier method, are used to quantify the preference of each data set to
quantities such as $\alpha_s(m_Z)$, and the gluon and strange quark
distributions. We designate the main resulting PDF set as CT18. The ATLAS 7 TeV
precision $W/Z$ data are not included in CT18, due to their tension with other
data sets in the global fit. Alternate PDF sets are generated including the
ATLAS precision 7 TeV $W/Z$ data (CT18A), a new scale choice for low-$x$ DIS
data (CT18X), or all of the above with a slightly higher choice for the charm
mass (CT18Z). Theoretical calculations of standard candle cross sections at the
LHC (such as the $gg$ fusion Higgs boson cross section) are presented.
