  We present models in which the observed fermion masses and mixings are
generated by dynamically localizing the three generations of matter in a flat
compact extra dimension. We first construct models assuming the hierarchy
problem is addressed by the existence of large extra dimensions, i.e. the
fundamental scale is not far above a TeV and supersymmetry is not imposed.
These models are compactified, chiral, and don't require fine-tuning to
generate the top mass. Limits on the compactification scale based on
flavor-changing neutral currents are relaxed compared to those on existing
models. We then supersymmetrize some of these models. Using N=1 superspace
language in extra dimensions, we find space-dependent flat directions which can
be used to localize fields. Finally, we discuss methods of breaking
supersymmetry and the impact of these models on the superpartner spectrum.
