  Lattice QCD is rapidly progressing toward being able to reliably compute the
electric dipole moment of the neutron as a function of the strong CP-violating
parameter theta. Present day calculations are performed at unphysical values of
the light quark masses, in volumes that are not exceptionally large and at
lattice spacings that are not exceptionally small. We use chiral perturbation
theory to determine the leading contributions to the neutron electric dipole
moment at finite volume, and in partially-quenched calculations.
