We report the parallax and proper motion of millisecond pulsar J0030+0451 , one of thirteen known isolated millisecond pulsars in the disk of the Galaxy .
We obtained more than 6 years of monthly data from the 305 m Arecibo telescope at 430 MHz and 1410 MHz .
We measure the parallax of PSR J0030+0451 to be 3.3 \pm 0.9 mas , corresponding to a distance of 300 \pm 90 pc .
The Cordes and Lazio ( 2002 ) model of galactic electron distribution yields a dispersion measure derived distance of 317 pc which agrees with our measurement .
We place the pulsar ’ s transverse space velocity in the range of 8 to 17 km s ^ { -1 } , making this pulsar one of the slowest known .
We perform a brief census of velocities of isolated versus binary millisecond pulsars .
We find the velocities of the two populations are indistinguishable .
However , the scale height of the binary population is twice that of the isolated population and the luminosity functions of the two populations are different .
We suggest that the scale height difference may be an artifact of the luminosity difference .