An eruv  (Hebrew: עירוב‎ mixture, also transliterated as eiruv)  is a ritual enclosure that some communities construct in their neighborhoods as a way to permit Jewish residents or visitors to carry certain objects outside their own homes on Shabbat.

An eruv accomplishes this by integrating a number of private and public properties into one larger private domain.

The eruv allows Jews to, among other things, carry house keys, tissues, medicines, or babies with them, and use strollers and canes. The presence or absence of an eruv thus especially affects the lives of people with limited mobility and those responsible for taking care of babies and young children.

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