Grub AR is a municipality in the canton of Appenzell Ausserrhoden in Switzerland.

History

thumb|Aerial view from 300 m by [[Walter Mittelholzer (1923)]]

Grub is first mentioned in 1488 as uss der Gruob. Over the last 10 years the population has decreased at a rate of -1.8%. Most of the population () speaks German (94.4%), with Spanish being second most common ( 1.0%) and Italian being third ( 0.5%).

, the gender distribution of the population was 48.9% male and 51.1% female.

In the 2007 federal election the FDP received 68.3% of the vote.