Introduction: Clinical outcome from childhood cerebral sinovenous thrombosis (CSVT), particularly in younger children, is poor. Most studies report “general” neurological outcomes; few describe neuropsychological outcomes.Objectives: To study the spectrum of neuropsychological deficits following childhood CSVT. Methods: Retrospective analysis of neuropsychological testing (NPT) performed in children with CSVT from 1995-2011. NPT included IQ [Wechsler Intelligence Score for Children (WISC-IV), Wechsler Preschool & Primary Scale of intelligence (WPPSI-III)], executive function [Behaviour Rating Inventory of Executive Function (BRIEF)] and attention [Test of everyday attention (Tea-Ch)]. Full scale IQ (FSIQ) included verbal comprehension (VCI), perceptual reasoning (PRI), working memory (WMI) and processing speed (PSI) index.Results: NPT [mean age: 5.4-years (neonatal CSVT), 8.5-years (non-neonatal CSVT)] was performed in 48/206 patients. Forty-one (34 males) were included [exclusions: cavernous sinus thrombosis (5), prematurity (1), co-existing arterial stroke (1)]. NPT revealed some abnormality in 87% [across one (29%)/multiple (58%) domains] compared to normative population. FSIQ was abnormal in 64% [VCI-69%, PRI-80%, WMI-71%, PSI-79%). FSIQ (p=0.026), VCI (p=0.608), PRI (p= 0.032), WMI (0.124) and PSI (p=0.007) scores were lower. No differences were seen in FSIQ between groups [neonates/non-neonates (p=0.827), single/multiple sinus thrombosis (p=0.2), present/absent parenchymal lesions (p=0.991)] except gender. Males had lower FSIQ (p=0.006) [PRI (p=0.004), WMI (p=0.002), PSI (p=0.002)], BRIEF [metacognition (p=0.061), executive composite (p=0.0950)] and Tea-Ch (p=0.046) scores. Conclusions: Many childhood CSVT survivors (males > females) have significant residual cognitive deficits detectable only by NPT on long-term follow-up. NPT is indicated for more accurate CSVT outcome assessment.