OBJECTIVES: To study the relationship between psoriatic arthritis (PsA) prevalence and geographic variation and demographic characteristics in the U.S. veteran population. METHODS: Using the Veterans Health Administration (VHA) Medical SAS Datasets from October 1, 2005 to May 31, 2012, a retrospective database analysis was performed. All U.S. veteran beneficiaries diagnosed with PsA were identified using International Classification of Disease 9th Revision Clinical Modification (ICD-9-CM) diagnosis code 696.0. All patients with medical benefit enrollment in 2011 were included in the study. Descriptive statistics were calculated as means ± standard deviation (SD) and percentages to measure age, race and other related factors in the sample.  RESULTS: A total of 22,102 veterans were diagnosed with PsA during 2011. The state of Vermont had the highest prevalence rate (0.29%), followed by New Hampshire (0.23%), and Maine (0.23%). All other states were observed with prevalence rates lower than 0.2%. Washington D.C. had only three cases of the disease, which translated into 0.02% of prevalence. Patients age 55-64 were most likely to be diagnosed with PsA (0.15%). Prevalence was lower by 0.05% for patients age 35-54 and 65+ (0.10%). Younger patients were less likely to be diagnosed with the disease (<0.05%). PsA diagnoses also varied by race: Non-Hispanic White (0.14%), Hispanic (0.12%), Non-Hispanic Black (0.03%), and other races (0.08%). CONCLUSIONS: PsA was unevenly distributed across the United States when measured by age group and race. Geographic variation was also related to disease occurrence. These factors should be taken into consideration for further studies.