Lower urinary tract symptoms (LUTS) are an underrecognized complication of diabetes mellitus (DM) in adults and have undergone limited investigation in children. We estimated the prevalence of LUTS in 120 older children (11-17 years) with and without DM and identified patient factors associated with LUTS in logistic regression. Older children (11-17 years) completed a validated LUTS measure and questions about age, ethnicity, gender, body mass index, and degree of bother secondary to LUTS. The unadjusted prevalence of LUTS was 20.87% in the overall cohort, and LUTS was twice as prevalent in children with DM (33.3% vs 16.7%) than children without DM. In logistic regression, Hispanic/Latino ethnicity was positively associated with LUTS (odds ratio = 8.45, P = .011). LUTS may be a prevalent but underrecognized condition, which is more prevalent in Hispanic/Latino and diabetic children.