Background: Intestinal schistosome infections are known to cause periportal fibrosis (PPF). Yet, the epidemiology of PPF remains poorly understood, especially in settings endemic with Schistosoma mansoni. Methods: We randomly sampled 1442 households from 38 villages in Mayuge, Buliisa, and Pakwach Districts of Uganda within the SchistoTrack Cohort to examine 2834 individuals aged 5-90 years. PPF was diagnosed using ultrasound and image patterns C-F from the Niamey Protocol. S. mansoni infection status/intensity was diagnosed by Kato-Katz microscopy and point-of-care circulating cathodic antigens (POC-CCA). Schistosome infection, coinfections, and comorbidities were examined as exposures for PPF. Logistic regressions were run with standard errors clustered by household. Findings: PPF prevalence was 12.10% (343/2834), varying from 5.00-19.46% across districts. S. mansoni prevalence by Kato-Katz, and POC-CCA trace negative and positive was 43.37% (1229/2834), 40.86% (1158/2834), and 65.73% (1863/2834) respectively. Individual schistosome infection status/intensity was not correlated with the likelihood of PPF. Living in a village where adults had <5% prevalence of heavy intensity infections (400+ eggs per gram of stool) was associated with 30.2% decreased odds of PPF. The likelihood of PPF with age linearly increased from 5-25, exponentially changed from 26-45, remain unchanged from 45-60, and steadily decreased past 60 years. History of liver diseases, human immunodeficiency virus positivity (HIV+), and ultrasound-detected chronic hepatitis/early cirrhosis-like disease were associated with >2-fold increased PPF likelihood. Interpretation: Current individual schistosome infections alone are uninformative for PPF. History of HIV+ and underlying chronic hepatitis/early cirrhosis-like disease were risk factors and could be investigated for PPF surveillance and management. Funding: Nuffield Department of Population Health Pump Priming Fund, Wellcome Trust Institutional Strategic Support Fund (204826/Z/16/Z), John Fell Fund, Robertson Foundation Fellowship, and UKRI EPSRC Award (EP/X021793/1).