  We study the behavior of neutral meson properties in the presence of a static
uniform external magnetic field in the context of nonlocal chiral quark models.
The formalism is worked out introducing Ritus transforms of Dirac fields, which
allow to obtain closed analytical expressions for $\pi^0$ and $\sigma$ meson
masses and for the $\pi^0$ decay constant. Numerical results for these
observables are quoted for various parameterizations. In particular, the
behavior of the $\pi^0$ meson mass with the magnetic field is found to be in
good agreement with lattice QCD results. It is also seen that the
Goldberger-Treiman and Gell-Mann-Oakes-Renner chiral relations remain valid
within these models in the presence of the external magnetic field.
