520 Background: Squamous cell carcinoma of the anus (SSCA) is one of only few cancers with rising incidence in the United States (US). This is believed to represent changing epidemiology of human papillomavirus (HPV) and Human Immunodeficiency Virus (HIV). We explored the racial and sex disparities in the rising incidence of SSC. Methods: The Surveillance, Epidemiology, and End Results (SEER) database was used to identify subjects with SCCA from 2000-2012. Age-standardized incidence rates (IR) per 100,000 for 2000-2012 time period were generated in Rate Session in SEER for white males (WM), white females (WF), black males (BM) and black females (BF). The 2000 US standard population was used for age standardization. The trend of change of IR between groups was compared by testing the interaction between time and group in the linear regression model. SAS 9.4 was used for analysis Results: Among 11,739 new cases of SSCA racial and sex distribution of cases was WM:32%, WF:54%, BM:5.4%, BF:5.4%. Median overall survival (OS) was WM:101 months (m), WF:139 m, BM: 71 m, BF 103 m (p < 0.005). The IR had the highest rate of increase for WF and BM (0.06/100,000 cases annually) while rates for BF and WM increased by 0.04 and 0.02/100,000 cases annually respectively. The overall test for difference in trend among WF, WM, BF and BM groups had a p-value of 0.0099. Conclusions: The rate of increase of SSCA IR is highest for WF and BM. Additionally WF have the highest age standardized incidence of SCCA as well as the highest OS compared to other groups. These data support disparities in epidemiology and survival of anal cancer.