UR

Ur or ur may refer to:

In toponymy:
*Ur, an ancient city in southern Mesopotamia
**Royal Game of Ur, two game boards found in Royal Tombs of Ur and dating from the First Dynasty of Ur, before 2600 BC
*Hayy Ur, a neighborhood of eastern Baghdad, Iraq
*Ur, Pyrénées-Orientales, a commune of the Pyrénées-Orientales "département" in southern France

In typography:
*Úr Unicode|ᚒ, a letter of the Ogham alphabet
*Ur (rune) ᚢ, a letter of the runic alphabets

;, a German prefix, meaning "original, primitive", see:
*Proto-World language
*Urheimat
*Ursprache
*Urreligion
*Urmonotheismus
*Ur (continent), the name given to the first known continent in tectonics

In popular culture:
*"UR", a song by DJ Tiësto from his album Just Be
*A codename for the Polish Karabin przeciwpancerny wzór 35 anti-tank rifle

UR or ur is an abbreviation for:
*Canton of Uri, Switzerland
*Underground Resistance, a US techno music label
*Underlying representation in phonology
*Urdu language (ISO 639 alpha-2, ur)
*Sveriges Utbildningsradio, the Swedish Educational Broadcasting Corporation
*The first person shooter PC game Unreal or the series of games
*"Your" or "you're", especially in internet slang or SMS language
*"Ur-Quattro", meaning the original Audi Quattro, 1980-1991

UR is an abbreviation for several universities:
* University of Regina, in Canada
* University of Richmond, in the United States
* University of Rochester, in the United States
* University of Rhode Island, in the United States