U.S. servicemembers train and operate in all weather (e.g., wind, rain, snow, cold) and geographic (e.g., mountain, desert, ocean) conditions. Prolonged and/or intense exposures to cold can significantly degrade the health, well-being, and operational effectiveness of servicemembers and their units. The U.S. military has developed extensive and effective countermeasures against threats associated with training and operating in cold environments. Reports of cold weather injuries are routinely surveilled by the Army Medical Surveillance Activity (AMSA). This report summarizes frequencies, rates, and correlates of risk of cold injuries among active duty members of the U.S. Armed Forces during the period July 1999 to June 2004., Pub. in Medical Surveillance Monthly Report (MSMR), v10 n5, p1-20, September/October 2004. Analysis by Jamease R. /Kowalczyk.