  We investigate whether models with flat extra dimensions in which SM fields
propagate can give a significant contribution to the anomalous magnetic moment
of the muon (MMM). In models with only SM gauge and Higgs fields in the bulk,
the contribution to the MMM from Kaluza-Klein (KK) excitations of gauge bosons
is very small. This is due to the constraint on the size of the extra
dimensions from tree-level effects of KK excitations of gauge bosons on
precision electroweak observables such as Fermi constant. If the quarks and
leptons are also allowed to propagate in the (same) bulk (``universal'' extra
dimensions), then there are no contributions to precision electroweak
observables at tree-level. However, in this case, the constraint from one-loop
contribution of KK excitations of (mainly) the top quark to T parameter again
implies that the contribution to the MMM is small. We show that in models with
leptons, electroweak gauge and Higgs fields propagating in the (same) bulk, but
with quarks and gluon propagating in a sub-space of this bulk, both the above
constraints can be relaxed. However, with only one Higgs doublet, the
constraint from the process b -> s gamma requires the contribution to the MMM
to be smaller than the SM electroweak correction. This constraint can be
relaxed in models with more than one Higgs doublet.
