We present a catalog covering 1.62 deg ^ { 2 } of the COSMOS/UltraVISTA field with PSF-matched photometry in 30 photometric bands . The catalog covers the wavelength range 0.15 \micron \rightarrow 24 \micron including the available GALEX , Subaru , CFHT , VISTA and Spitzer data . Catalog sources have been selected from the DR1 UltraVISTA K _ { s } band imaging that reaches a depth of K _ { s,tot } = 23.4 AB ( 90 % completeness ) . The PSF-matched catalog is generated using position-dependent PSFs ensuring accurate colors across the entire field . Also included is a catalog of photometric redshifts ( z _ { phot } ) for all galaxies computed with the EAZY code . Comparison with spectroscopy from the zCOSMOS 10k bright sample shows that up to z \sim 1.5 the z _ { phot } are accurate to \Delta z / ( 1 + z ) = 0.013 , with a catastrophic outlier fraction of only 1.6 % . The z _ { phot } also show good agreement with the z _ { phot } from the NEWFIRM Medium Band Survey ( NMBS ) out to z \sim 3 . A catalog of stellar masses and stellar population parameters for galaxies determined using the FAST spectral energy distribution fitting code is provided for all galaxies . Also included are rest-frame U-V and V-J colors , L _ { 2800 } and L _ { IR } . The UVJ color-color diagram confirms that the galaxy bi-modality is well-established out to z \sim 2 . Star-forming galaxies also obey a star forming “ main sequence ” out to z \sim 2.5 , and this sequence evolves in a manner consistent with previous measurements . The COSMOS/UltraVISTA K _ { s } -selected catalog covers a unique parameter space in both depth , area , and multi-wavelength coverage and promises to be a useful tool for studying the growth of the galaxy population out to z \sim 3 - 4 .