Mar, mar or MAR may refer to:

• Mar, a title of respect in Syriac
• Earl of Mar, an earldom in Scotland
• MAA (singer) Previously known as Mar (stylized as MAR), a Japanese recording artist, former TV host and model
• Marathi language, language code by ISO 639-2
• March, the third month of the year in the Gregorian calendar
• Master of Arts in Religion, a type of Master's degree

For the verb "to mar", see

East Syriac: Mar or West Syriac: Mor (as pronounced respectively in eastern and western dialects, from , , written with a silent final yodh) is a title of respect in Syriac, literally meaning 'my lord'. It is given to all saints and is also used before Christian name of bishops. The corresponding feminine form given to women saints is Mart or Mort (, ). The title is placed before the Christian name, as in Mar Aprem/Mor Afrem and Mart/Mort Maryam. This is the original meaning of the name Martha 'A Lady'.

Märchen Awakens Romance, officially abbreviated as , is a manga series written and illustrated by Nobuyuki Anzai. The anime television series based on the series is titled and was originally broadcast in Japan on the TXN station.

The Gospel According to Mark (, to kata Markon euangelion), the second book of the New Testament, is one of the four canonical gospels and the three synoptic gospels. It was traditionally thought to be an epitome (summary) of Matthew, which accounts for its place as the second gospel in the Bible, but most scholars now regard it as the earliest of the gospels. Most modern scholars reject the tradition which ascribes it to Mark the Evangelist, the companion of Peter, and regard it as the work of an unknown author working with various sources including collections of miracle stories, controversy stories, parables, and a passion narrative.

The Margin-at-Risk (short: MaR) is a quantity used to manage short-term liquidity risks due to variation of margin requirements, i.e. it is a financial risk occurring when trading commodities. Similar to the Value-at-Risk (VaR), but instead of the instead of the EBIT it is a quantile of the (expected) cash flow distribution.