When it comes to nonlocal electron correlation, as required by the physics of dispersion, there are only a few functionals to be found in the literature. The first among these was vdW-DF04, 17 sometimes called vdW-DF1, which was later reformulated into an improved version known as vdW-DF2. It has since spawned other variants that use the same nonlocal correlation model. That model employs a numerically tabulated kernel, which delayed the self-consistent implementation of vdW-DF. A simpler nonlocal correlation functional, with an analytic construction, was developed later by Vydrov and Van Voorhis and is known as VV10, superseding a predecessor called VV09, and with a revision called rVV10 that is better suited for plane-wave basis sets. The analytic construction of VV10, combined with poor performance of vdW-DF04 when paired with hybrid XC functionals, likely accounts for the more widespread adoption of VV10 in molecular applications, although rVV10 has been incorporated into functionals designed for the solid state. For molecules, which are the focus of the present chapter, a notable use of VV10 is its incorporation into the highly successful B97-based 161 functionals developed over the past decade by Mardirossian and Head-Gordon. Some meta-GGA functionals that lack nonlocal correlation have also been advocated as DFT solutions for noncovalent problems, particularly those in the "Minnesota" class of meta-GGAs, and especially M05-2X and M06-2X. As meta-GGAs, the Minnesota functionals include a dependence on both the density Laplacian and the kinetic energy density, and as a result their (still local) kernels may extend farther from the nuclei as compared to functionals on lower rungs of Jacob's Ladder. The practical result is that semilocal XC effects are nonzero at vdW contact distances, therefore some attractive interactions are built into their parameterization, mimicking dispersion at typical vdW separations even if true long-range dispersion is missing. This contrasts what is observed for PBE and B3LYP in Fig. , where interaction potentials for (C 6 H 6 ) 2 and Kr 2 are strictly repulsive. Notably, the Minnesota functionals are highly parameterized even as compared to other empirical XC functionals. For the present overview, we selected a small set of XC functionals that perform especially well for noncovalent interaction energies according to a recent comprehensive review of 200 functionals. The best-performing functionals are mostly (though not exclusively) meta-GGAs. The smallest overall root-mean-square error (RMSE) for noncovalent interaction energies is 0.2 kcal/mol for the ωB97M-V functional, but several other meta-GGAs also have RMSEs below 0.5 kcal/mol including ωB97X-V, 25 M06-2X, and TPSSh, and B97M-rV. These are functionals that are designed to capture dispersion from first principles, without the use of ad hoc corrections, although a variety of functionals that include such corrections have error statistics that are equally impressive. Double-hybrid functionals, which include a fraction of the correlation energy from second-order Møller-Plesset (MP2) perturbation theory, will not be considered because they fundamentally alter the cost and thus the efficacy of DFT calculations. Moreover, finite-order MPn theory affords troubling divergences for nanoscale vdW complexes that may be inherited by doublehybrid functionals. The performance of double-hybrids for noncovalent interactions is discussed elsewhere. It is important to note that meta-GGA functionals often exhibit more acute dependence on the numerical integration scheme as compared to functionals on lower rungs of Jacob's Ladder. Noncovalent interactions are especially sensitive in this regard because they depend on small oscillations in the tails of the electron density, characterized by large values of the reduced density gradient, s(r) = ∇ρ(r) 2(3π 2 ) 1/3 ρ(r) 4/3 .