ObjectiveOverall, 2%-5% of patients with multiple sclerosis (MS) experiencedthe first episode of disease before the age 18 years old. Since the age ofonset among children is not similar to that in general population, cliniciansoften fail to early diagnose the disease. This study aimed to determine theepidemiological and clinical patterns of MS among Iranian children.Materials & MethodsIn this cross-sectional study carried out in Iran in 2014-2015, informationwas collected using a checklist with approved reliability and validity. Methodsampling was consensus. Data were analyzed using frequency, mean andstandard deviation indices by means of SPSS ver.20 software.ResultsTotally, 177 MS children were investigated.75.7% of them were female.Mean (SD), minimum and maximum age of subjects were 15.9 (2), 7 and 18yr, respectively. The most reported symptoms were sensory (28.2%), motor(29.4%), diplopia (20.3%) and visual (32.8%). Primary MRI results showed91.5% and 53.1% periventricular and spinal cord lesions, respectively.ConclusionMS is significantly more common among women. The most common age ofonset is during the second decades. Sensory and motor problems are the mostsymptoms, while, periventricular and spinal cord lesions are the most MRIresults.