  Data on the multiplicity of F- and G-type dwarf stars within 67pc of the Sun
are presented. This distance-limited sample based on the Hipparcos catalog
contains 4847 primary stars (targets) with 0.5<V-I_C<0.8 and is >90% complete.
There are 2196 known stellar pairs, some of them belong to 361 hierarchical
systems from triples to quintuples. Models of companion detection by radial
velocity, astrometric acceleration, direct resolution, and common proper motion
are developed. They serve to compute completeness for each target, using the
information on its coverage collected here. About 80% of companions to the
primary stars are detected, but the census of sub-systems in the secondary
components is only about 30%. Masses of binary components are estimated from
their absolute magnitudes or by other methods, the periods of wide pairs are
evaluated from their projected separations. A third of binaries with periods
shorter than ~100yr are spectroscopic and/or astrometric pairs with yet unknown
periods and mass ratios. These data are used in the accompanying Paper II to
derive unbiased statistics of hierarchical multiple systems.
