  We have searched for and estimated the possible gravitational influence of
dark matter in the Solar system based on the EPM2011 planetary ephemerides
using about 677 thousand positional observations of planets and spacecraft.
Most of the observations belong to present-day ranging measurements. Our
estimates of the dark matter density and mass at various distances from the Sun
are generally overridden by their errors ($\sigma$). This suggests that the
density of dark matter ${\rho}_{dm}$, if present, is very low and is much less
than the currently achieved error of these parameters. We have found that
${\rho}_{dm}$ is less than $1.1\cdot10^{-20}$ g cm$^{-3}$ at the orbital
distance of Saturn, ${\rho}_{dm}<1.4\cdot10^{-20}$ g cm$^{-3}$ at the orbital
distance of Mars, and ${\rho}_{dm}<1.4\cdot10^{-19}$ g cm$^{-3}$ at the orbital
distance of the Earth. We also have considered the case of a possible
concentration of dark matter to the Solar system center. The dark matter mass
in the sphere within Saturn's orbit should be less than $1.7\cdot10^{-10}
M_{\odot}$ even if its possible concentration is taken into account.
