To evaluate the association between admission blood glucose (ABG) and mortality following hospitalization of solid-organ transplant recipients with and without diabetes.Descriptive, retrospective observational data extracted from electronic health records.Observational data derived from the electronic health records of solid-organ transplant recipients who were hospitalized patients 18 years and older, admitted for any cause between January 2011 and December 2013. ABG levels were classified into categories: 70 to 110 mg/dL (normal), 111 to 140 mg/dL (mildly elevated), 141 to 180 mg/dL (moderately elevated), and greater than 180 mg/dL (markedly elevated). The main outcome was all-cause mortality.Our study included 832 patients (median [SD] age = 59 [14] years; 62% male; 68% kidney transplant recipients), 503 (61%) of whom did not have diabetes. Just over half of patients without diabetes had normal ABG (54%), whereas most of those with diabetes had moderately or markedly increased ABG (58%). In patients without diabetes, markedly elevated ABG was associated with increased 30-day mortality risk compared with normal ABG (adjusted odds ratio [aOR], 6.6; 95% CI, 1.9-22.1). The same pattern was evident with investigation of the mortality risk after 1 year (aOR, 5.9; 95% CI, 2.4-14.7) and 3 years (aOR, 10.2; 95% CI, 4.3-24.0). Among patients with diabetes, there was no difference in mortality risk with different ABG. With a competing risk model for 90-day readmission and mortality, there was no association between ABG and risk for readmissions in patients with or without diabetes.In organ transplant recipients admitted for any cause to a general ward, markedly elevated ABG in patients without diabetes was found to be independently associated with higher mortality risk compared with normal ABG levels. In patients with diabetes, there was no association between ABG level and mortality.