JA

JA, Ja, or ja may refer to:

• Ja, grammatical particle meaning "yes" in most Germanic languages, e.g. German (including informal English)
• Ja in Slavic languages means I
• Jamaica
• JA, a platform of vehicles made by Chrysler
• Jane's Addiction, the American alternative rock band
• Japan, Nato country code
• Japanese language, ISO 639-1 alpha-2
• Jasmonic acid
• JoomlArt, Professional Joomla Template/Extension Club
• Judge Advocate
• Judge of Appeal
• Junior Achievement
• B&H Airlines, IATA airline designator JA
• The Cyrillic letter Я, also known as ya
• Ja, is the unit of measurement of length in Korea.

JA is the name of:

• Ja Rule, an American rapper
• Jonathan Avildsen, known as JA ONE
• JA (TV series) Danish television show

JA may also refer to:

• Japan Agricultural Cooperatives, in Japan
• British Rail Class 73/0 electro-diesel locomotives. Pre-TOPS classification JA
• Jackson County, Kansas, whose two-letter code on Kansas license plates is JA
• Jamiat Ahle Hadith a political party in Pakistan