The purpose of this retrospective study is to review the incidence and etiology of frontal sinus fractures at an urban trauma center and validate a treatment protocol by assessing the outcome of a consecutive series of patients treated over a 10-year period. All patients with frontal sinus fractures admitted to our trauma service from 1995 to 2005 were managed by the same surgeons using similar treatment philosophies based on the amount of displacement or comminution of the anterior and/or posterior table, the integrity of the nasofrontal duct, and the neurologic status of the patient as determined by clinical and radiographic examination. Using information obtained from the Trauma Registry and from individual physician chart notes, a database was created for the purpose of assessing outcome, defined as complications, length of hospital stay, and death. Demographics, injury severity score, fracture pattern, mechanism of injury, length of hospital stay, the number of operations, concomitant maxillofacial injuries, treatment, follow-up, and complications were statistically described. Outcome measures were evaluated by Student's t test using continuous variables. One thousand two hundred seventy-five patients with facial fractures were identified during the study period, of which 144 patients (11.3%) carried the diagnosis of frontal sinus fracture; 28 patients had inadequate records, leaving a study group of 116 patients. The majority of patients were male, had a mean age of 33.7 years, and presented with significant injuries demonstrated by a mean injury severity score of 23.7 and mean length of hospital stay of 8.9 days. The most common mechanisms of injury were blunt trauma resulting from a motor vehicle collision, fall, assault, or other accidents. Sixty-six patients presented with nondisplaced frontal sinus fractures that were managed nonoperatively; 50 patients had frontal sinus injuries that required surgical repair consisting of: 1) open reduction and internal fixation of the anterior table alone, with preservation of the sinus membrane (n = 29); 2) removal of all sinus mucosa, obliteration of the frontal sinus with autogenous abdominal fat, and reconstruction of the anterior table (n = 5); and 3) removal of all sinus mucosa, cranialization of the frontal sinus, and lining of the nasofrontal recess with a pericranial flap (n = 16). Six patients died of concomitant injuries. With follow-up ranging between 0 and 90 weeks, there were no known complications in the patients treated nonoperatively; 82% of the patients maintained normal sinus function and anatomy and the overall complication rate was 6.9%. Complications occurred in 16% of those patients treated surgically: including brain abscess, contour deformity, osteomyelitis, hematoma, meningitis, and mucocele. There was no statistically significant association between complications and other patient variables (P > .05), other than the test for injury severity score, which was different between survivors and nonsurvivors (P < .01). Application of the management protocol described in this report results in functional sinus preservation for the majority of patients, with relatively few significant perioperative complications.