Religious segregation is the separation of people according to their religion. The term has been applied to cases of religious-based segregation occurring as a social phenomenon, as well as to segregation arising from laws, whether explicit or implicit.
The similar term religious apartheid has also been used for situations where people are separated based on religion, including sociological phenomena.
In 2012 Foreign Policy reported that
The number of "peace walls," physical barriers separating Catholic and Protestant communities, has increased sharply since the first ceasefires in 1994. Most people in the region cannot envisage the barriers being removed, according to a recent survey conducted by the University of Ulster. In housing and education, Northern Ireland remains one of the most segregated tracts of land anywhere on the planet -- less than one in 10 children attends a school that is integrated between Catholics and Protestant. This figure has remained stubbornly low despite the cessation of violence.
Jonathan Steele of The Guardian has argued that Bosnia and Herzegovina is "a dependent, stifled, apartheid regime". In his view, the U.N. control of Bosnia under the High Representative for Bosnia and Herzegovina, which he described as "UN-sanctioned liberal imperialism", creates "dependency, stifles civil society, and produces a highly visible financial apartheid in which an international salariat lords it over a war-wounded and jobless local population."
Shi'a Islam has been the state religion of Iran since the Iranian Revolution in 1979. While Judaism, Christianity, and Zoroastrianism are officially recognized and legally protected religious minorities, they are not allowed to evangelize or allow Muslim Iranians to convert to their faiths. The U.S. State Department has claimed that religious minorities have been subject to harassment and persecution.