The purpose of this study was to use population-based sources to estimate the frequency and characteristics of first inpatient hospital admission through an emergency department (ED) among 11,023 patients with diagnosed colorectal cancer between 1992 and 1996. Patients were identified from the population-based Connecticut Tumor Registry. Linkage with a statewide hospital discharge database (inpatient only) disclosed that 20% had a first hospital inpatient admission through an ED. Inpatient admission through an ED was statistically significantly associated with older age and race and was a statistically significant risk factor for distant stage at diagnosis. Studies are needed of the roles of patient delay and lack of screening in influencing ED presentation, especially in the elderly.