
Sanctuary cities are jurisdictions that have adopted policies to protect undocumented immigrants from federal immigration enforcement. While there is no universal definition of a sanctuary city, these policies typically include restrictions on local law enforcement's ability to make arrests for federal immigration violations or to detain individuals on civil immigration warrants. In the United States, this can mean prohibiting police or city employees from questioning people about their immigration status and refusing requests by national immigration authorities to detain people beyond their release date if they were jailed for breaking local law. Sanctuary cities are controversial, with some arguing that they break federal law and enable undocumented immigrants to avoid detection and deportation. However, supporters of sanctuary cities argue that enforcement of federal law is not the duty of localities and that resources can be better prioritised towards public safety and community-building.
| Characteristics | Values |
|---|---|
| Federal law enforcement | Sanctuary cities do not enforce federal law, instead prioritising law enforcement resources towards better purposes. |
| Immigration status | Sanctuary cities prohibit police or city employees from questioning people about their immigration status. |
| Immigration detention | Sanctuary cities refuse requests by national immigration authorities to detain people beyond their release date, if they were jailed for breaking local law. |
| Criminal law | Local law enforcement still enforces state and local criminal laws against immigrants who are accused of committing a crime in sanctuary jurisdictions. |
| Information-sharing | Some sanctuary cities adopt policies that restrict the ability of local police to make arrests for federal immigration violations or to detain individuals on civil immigration warrants. |
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What You'll Learn
- Sanctuary cities are not breaking the law by concealing or sheltering undocumented immigrants from federal authorities
- Local law enforcement does not protect undocumented immigrants from deportation or prosecution for criminal activities
- Sanctuary cities are safer for everyone
- Sanctuary cities are not breaking the law by prohibiting police from questioning people about their immigration status
- Sanctuary cities are not breaking the law by refusing requests by national immigration authorities to detain people beyond their release date

Sanctuary cities are not breaking the law by concealing or sheltering undocumented immigrants from federal authorities
Sanctuary cities are safer for everyone. Sanctuary policies allow immigrants to report abuses and engage with public safety officials without fear of deportation. Sanctuary city policies allow immigrants to feel more comfortable acting as witnesses in criminal investigations.
Supporters of sanctuary cities argue that enforcement of federal law is not the duty of localities, and that law enforcement resources can be prioritised towards better purposes. The term "sanctuary city" in Europe generally refers to cities committed to supporting documented refugees and asylum seekers, not illegal immigrants. Over 80 towns and cities across the United Kingdom adopt policies aimed at fostering community connections, raising awareness, and building cultural ties to support these groups. Glasgow and Swansea have become noted sanctuary cities.
In the United States, municipal policies include prohibiting police or city employees from questioning people about their immigration status and refusing requests by national immigration authorities to detain people beyond their release date, if they were jailed for breaking local law.
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Local law enforcement does not protect undocumented immigrants from deportation or prosecution for criminal activities
Sanctuary cities are jurisdictions that adopt policies to restrict the ability of local police to make arrests for federal immigration violations or to detain individuals on civil immigration warrants. These policies do not mean that local law enforcement conceals or shelters undocumented immigrants from detection by federal authorities. Nor does it mean that local law enforcement protects undocumented immigrants from deportation or prosecution for criminal activities. State and local police still enforce state and local criminal laws against immigrants who are accused of committing a crime in sanctuary jurisdictions.
In the United States, municipal policies include prohibiting police or city employees from questioning people about their immigration status and refusing requests by national immigration authorities to detain people beyond their release date, if they were jailed for breaking local law.
Sanctuary policies do not mean that local law enforcement protects undocumented immigrants from deportation or prosecution for criminal activities. Local law enforcement officers are not deputised to enforce federal immigration law. This means that undocumented immigrants can still be deported or prosecuted for criminal activities, even in sanctuary cities.
Sanctuary cities are safer for everyone. Sanctuary policies allow immigrants to report abuses and engage with public safety officials without fear of deportation. Immigrants can feel more comfortable acting as witnesses in criminal investigations.
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Sanctuary cities are safer for everyone
Supporters of sanctuary cities argue that enforcement of federal law is not the duty of localities, and that law enforcement resources can be prioritised towards better purposes. State and local police still enforce state and local criminal laws against immigrants who are accused of committing a crime in sanctuary jurisdictions. Sanctuary policies do not mean that local law enforcement conceals or shelters undocumented immigrants from detection by federal authorities. Nor does it mean that local law enforcement protects undocumented immigrants from deportation or prosecution for criminal activities.
In Europe, the term 'sanctuary city' generally refers to cities committed to supporting documented refugees and asylum seekers, not illegal immigrants. Over 80 towns and cities across the United Kingdom adopt policies aimed at fostering community connections, raising awareness, and building cultural ties to support these groups. Glasgow and Swansea have become noted sanctuary cities.
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Sanctuary cities are not breaking the law by prohibiting police from questioning people about their immigration status
Sanctuary cities are safer for everyone, as they allow immigrants to report abuses and engage with public safety officials without fear of deportation. They also allow immigrants to feel more comfortable acting as witnesses in criminal investigations.
Sanctuary policies do not mean that local law enforcement conceals or shelters undocumented immigrants from detection by federal authorities. Nor does it mean that local law enforcement protects undocumented immigrants from deportation or prosecution for criminal activities. State and local police still enforce state and local criminal laws against immigrants who are accused of committing a crime in sanctuary jurisdictions.
There is no universal definition of a sanctuary city, and the term "sanctuary city" in Europe generally refers to cities committed to supporting documented refugees and asylum seekers, not illegal immigrants. However, certain states in the US have attempted to pass legislation that limits access by illegal immigrants to public benefits, such as Arizona's SB 1070 law, which was passed in 2010 and struck down in 2012 by the Supreme Court as unconstitutional.
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Sanctuary cities are not breaking the law by refusing requests by national immigration authorities to detain people beyond their release date
In Europe, the term "sanctuary city" generally refers to cities committed to supporting documented refugees and asylum seekers, not illegal immigrants. Over 80 towns and cities across the United Kingdom adopt policies aimed at fostering community connections, raising awareness, and building cultural ties to support these groups. Glasgow and Swansea have become noted sanctuary cities.
Sanctuary policies are public safety measures – laws that protect entire communities and encourage immigrants to access police protection. Sanctuary city policies allow immigrants to feel more comfortable acting as witnesses in criminal investigations.
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Frequently asked questions
No, supporters of sanctuary cities argue that enforcement of federal law is not the duty of localities. In the US, this means that municipal policies include prohibiting police or city employees from questioning people about their immigration status and refusing requests by national immigration authorities to detain people beyond their release date, if they were jailed for breaking local law.
There is no universal definition of a sanctuary city, but the term generally refers to cities committed to supporting documented refugees and asylum seekers, not illegal immigrants. In the US, this means that local law enforcement does not protect undocumented immigrants from deportation or prosecution for criminal activities.
Over 80 towns and cities in the UK have adopted policies to support refugees and asylum seekers, including Glasgow and Swansea. In the US, Berkeley, California became the first city to claim sanctuary status in 1971.










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