General usage

• Japan Airlines domestic service (IATA code)
• Job description (in the context of employment)
• Juris Doctor, a law degree held by some lawyers in certain countries
• Judgment Day
• John Doe
• Julian date, the Julian day number (JDN) plus the decimal fraction of the day
• United States Department of Justice
• Japan Air System
• Jordanian Dinar (more accurately abbreviated as JOD)
• Jamesville-Dewitt High School
• Juvenile delinquent
• Journal of Discourses, a historical periodical of The Church of Jesus Christ of Latter-day Saints

Sports

• John Davidson (ice hockey), a former player for the New York Rangers
• J.D. Drew, right fielder for the Boston Red Sox
• Jermaine Dye, right fielder for the Chicago White Sox
• WWE Judgement Day, a World Wrestling Entertainment (WWE) pay-per-view event
• JD, a sports shop, also known as JD Sports

Entertainment

• Jermaine Dupri, a music producer and founder of So So Def Records
• J. D. Harmeyer, a producer for The Howard Stern Show
• J. D. Salinger, author of The Catcher in the Rye
• Jonathan Davis, vocalist for the rock band Korn
• James Dean, actor
• Johnny Depp, actor
• Joy Division, a post-punk band from Manchester, England
• John Dorian, the fictional protagonist of the comedy-drama Scrubs
• James Yancey, a music producer also known as "Jay Dee" and as "J Dilla"
• John Darnielle, singer for the lo-fi indie band the Mountain Goats

Food

• Jimmy Dean
• Jack Daniel's

People

• Jacques Derrida
• Jefferson Davis
• Jason Dearborn
• John Deere
• Jermaine Defoe
• Johnny Damon
• J. D. Souther