  We show that in a class of universal extra dimension models (UED), which
solves both the neutrino mass and proton decay problem, an admixture of KK
photon and KK right handed neutrinos can provide the required amount of cold
dark matter (CDM). This model has two parameters $R^{-1}$ and $M_{Z'}$ ($R$ is
the radius of the extra space dimensions and $Z'$ the extra neutral gauge boson
of the model). Using the value of the relic CDM density, combined with the
results from the cryogenic searches for CDM, we obtain upper limits on $R^{-1}$
of about 400-650 GeV and $M_{Z'}\leq 1.5$ TeV, both being accessible to LHC. In
some regions of the parameter space, the dark matter-nucleon scattering cross
section can be as high as of $10^{-44}$ cm$^2$, which can be probed by the next
round of dark matter search experiments.
