A starspot is here considered as the surface manifestation of a submerged magnetic dipole. It seems likely that in red dwarfs, the dipole is generated by dynamo action within the outer convection zone. As a result, a starspot-associated dipole is highly decentered. By integrated the field of a decentered dipole over the disk of a spotted star, we have derived the effective longitudinal field (H/sub L/e), the effective transverse field (H/sub T/e), and the mean surface field (H/sub s/). If the axial field in a starspot is 10 kilogauss, we find that in the most favorable cases, H/sub L/e approx. = 150 gauss, H/sub T/e approx. = 1.1 kilogauss, and H/sub s/ approx. = 1.3 kilogauss.