- Iranian journal of public health
- Iranian studies : bulletin of the Society for Iranian Cultural and Social Studies
- Iraq
- Irish historical studies : joint journal of the Irish Historical Society and the Ulster Society for Irish Historical Studies
- Irish journal of medical science
- Irish journal of psychological medicine
- Irrigation and drainage
- Irrigation science
- ISBT science series
- Israel journal of chemistry
- Israel law review
- ISRN cardiology
- ISRN dermatology
- ISRN endocrinology
- ISRN hematology
- ISRN neurology
- ISRN nursing
- ISRN oncology
- ISRN orthopedics
- ISRN pathology
- ISRN pediatrics
- ISRN urology
- Issues in comprehensive pediatric nursing
- Issues in law & medicine
- Issues in mental health nursing
- Itinerario
- ITNow
- IUBMB life
- Izvestiya Atmospheric and oceanic physics / Russian Academy of Sciences
- JAAPA : official journal of the American Academy of Physician Assistants
- JACC Cardiovascular imaging
- JACC Cardiovascular interventions
- JACCP: journal of the American College of Clinical Pharmacy
- Jahresbericht der Deutschen Mathematiker-Vereinigung
- JAMA : the journal of the American Medical Association
- JAMA cardiology
- JAMA dermatology
- JAMA internal medicine
- JAMA neurology
- JAMA oncology
- JAMA ophthalmology
- JAMA otolaryngology-- head & neck surgery
- JAMA pediatrics
- JAMA psychiatry
- JAMA surgery
- Japan journal of nursing science : JJNS
- Japanese journal of applied physics
- Japanese journal of clinical oncology : JJCO
- Japanese journal of ophthalmology
- Japanese journal of radiology