  We present initial results from a survey of the Orion A and B molecular
clouds made with the InfraRed Array Camera (IRAC) onboard the Spitzer Space
Telescope. This survey encompasses a total of 5.6 square degrees with the
sensitivity to detect objects below the hydrogen burning limit at an age of 1
Myr. These observations cover a number of known star forming regions, from the
massive star forming clusters in the Orion Nebula and NGC 2024, to small groups
of low mass stars in the L1641. We combine the IRAC photometry with photometry
from the 2MASS point source catalog and use the resulting seven band data to
identify stars with infrared excesses due to dusty disks and envelopes. Using
the presence of an infrared excess as an indicator of youth, we show the
distribution of young stars and protostars in the two molecular clouds. We find
that roughly half of the stars are found in dense clusters surrounding the two
regions of recent massive star formation in the Orion clouds, NGC 2024 and the
Orion Nebula.
