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    • Active
    • Advancing liberty
    • Closed
    • Decided
    • Defending liberty
    • Filed
    • Historic
    • In federal trial court
    • In State Supreme Court
    • In state trial court
    • In U.S. Supreme Court
    • Landmark case
    • Lost
    • Lost appeal
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    • Open
    • Other
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All Cases

243 Court Cases
Court Case
Sep 02, 2025
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  • Immigrant Justice

United States of America v. State of Colorado, et al.

In a lawsuit brought against Colorado and Denver by the federal government, the ACLU of Colorado filed an amicus brief defending state and local laws that limit the diversion of their resources for the purpose of federal civil immigration enforcement. The brief argues that these laws are good policy, as they protect public safety and the functioning of state government, keep state actors within constitutional bounds, and promote the overall well-being of our communities and economy.
Court Case
Aug 21, 2025
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  • Freedom of Expression & Religion|
  • +2 Issues

SeeWalker v. Vail

Danielle SeeWalker was selected as Vail’s summer 2024 Artist in Residence. But after she expressed her views on the humanitarian crisis in Gaza, Vail cancelled her residency. We sued Vail on behalf of Ms. SeeWalker for the town's unconstitutional viewpoint-based discrimination and retaliation.
Court Case
Jul 18, 2025
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  • Immigrant Justice|
  • +3 Issues

ACLU, et al. v. U.S. ICE

The American Civil Liberties Union and ACLU of Colorado filed a lawsuit against ICE to obtain records regarding the agency’s potential plans to expand immigration detention across Colorado and Wyoming.
Court Case
Jun 13, 2025
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  • Freedom of Expression & Religion|
  • +3 Issues

Crookshanks, et al. v. Elizabeth School District

The ACLU of Colorado sued the Elizabeth School District because it banned and removed at least 19 books from school libraries based on the school board’s disagreement with the ideas they contain. The plaintiffs include students who have a right to access those books...
Court Case
Jun 12, 2025
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  • Racial Justice|
  • +3 Issues

Ruby Johnson v. Gary Staab and Gregory Buschy of the Denver Police Department

We sued two Denver Police Officers for searching our client's home based on an illegal search warrant lacking probable cause.
Court Case
May 19, 2025
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  • Unhoused Peoples' Rights|
  • +1 Issue

Feet Forward, et al. v. City of Boulder, et al.

The ACLU of Colorado filed a lawsuit challenging Boulder’s ordinance that criminalizes the city’s unhoused residents by making it a crime to sleep outside with a blanket.
Court Case
May 07, 2025
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  • Immigrant Justice|
  • +1 Issue

D.B.U. et al. v. Donald J. Trump et al.

The ACLU of Colorado filed an emergency class action lawsuit in the U.S. District Court for the District of Colorado to halt removals of Coloradans under the Alien Enemies Act.
Court Case
Mar 25, 2025
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Citizens Project et al. v. City of Colorado Springs

The ACLU of Colorado and the ACLU’s Voting Rights Project joined a lawsuit challenging Colorado Springs’ unusual election timing, which violates many of its minority citizens’ rights.
Court Case
Mar 17, 2025
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  • Criminal Legal Reform|
  • +1 Issue

Beagle v. People (Amicus)

The ACLU of Colorado filed an amicus brief arguing that Colorado’s Sexually Violent Predator designation is punishment.
Court Case
Sep 02, 2025
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Court Case
Sep 02, 2025
  • Immigrant Justice

United States of America v. State of Colorado, et al.

In a lawsuit brought against Colorado and Denver by the federal government, the ACLU of Colorado filed an amicus brief defending state and local laws that limit the diversion of their resources for the purpose of federal civil immigration enforcement. The brief argues that these laws are good policy, as they protect public safety and the functioning of state government, keep state actors within constitutional bounds, and promote the overall well-being of our communities and economy.
Explore Case
Court Case
Aug 21, 2025
Placeholder image
Court Case
Aug 21, 2025
  • Freedom of Expression & Religion|
  • +2 Issues

SeeWalker v. Vail

Danielle SeeWalker was selected as Vail’s summer 2024 Artist in Residence. But after she expressed her views on the humanitarian crisis in Gaza, Vail cancelled her residency. We sued Vail on behalf of Ms. SeeWalker for the town's unconstitutional viewpoint-based discrimination and retaliation.
Explore Case
Court Case
Jul 18, 2025
Placeholder image
Court Case
Jul 18, 2025
  • Immigrant Justice|
  • +3 Issues

ACLU, et al. v. U.S. ICE

The American Civil Liberties Union and ACLU of Colorado filed a lawsuit against ICE to obtain records regarding the agency’s potential plans to expand immigration detention across Colorado and Wyoming.
Explore Case
Court Case
Jun 13, 2025
Placeholder image
Court Case
Jun 13, 2025
  • Freedom of Expression & Religion|
  • +3 Issues

Crookshanks, et al. v. Elizabeth School District

The ACLU of Colorado sued the Elizabeth School District because it banned and removed at least 19 books from school libraries based on the school board’s disagreement with the ideas they contain. The plaintiffs include students who have a right to access those books...
Explore Case
Court Case
Jun 12, 2025
Placeholder image
Court Case
Jun 12, 2025
  • Racial Justice|
  • +3 Issues

Ruby Johnson v. Gary Staab and Gregory Buschy of the Denver Police Department

We sued two Denver Police Officers for searching our client's home based on an illegal search warrant lacking probable cause.
Explore Case
Court Case
May 19, 2025
Placeholder image
Court Case
May 19, 2025
  • Unhoused Peoples' Rights|
  • +1 Issue

Feet Forward, et al. v. City of Boulder, et al.

The ACLU of Colorado filed a lawsuit challenging Boulder’s ordinance that criminalizes the city’s unhoused residents by making it a crime to sleep outside with a blanket.
Explore Case
Court Case
May 07, 2025
Placeholder image
Court Case
May 07, 2025
  • Immigrant Justice|
  • +1 Issue

D.B.U. et al. v. Donald J. Trump et al.

The ACLU of Colorado filed an emergency class action lawsuit in the U.S. District Court for the District of Colorado to halt removals of Coloradans under the Alien Enemies Act.
Explore Case
Court Case
Mar 25, 2025
Placeholder image
Court Case
Mar 25, 2025

Citizens Project et al. v. City of Colorado Springs

The ACLU of Colorado and the ACLU’s Voting Rights Project joined a lawsuit challenging Colorado Springs’ unusual election timing, which violates many of its minority citizens’ rights.
Explore Case
Court Case
Mar 17, 2025
Placeholder image
Court Case
Mar 17, 2025
  • Criminal Legal Reform|
  • +1 Issue

Beagle v. People (Amicus)

The ACLU of Colorado filed an amicus brief arguing that Colorado’s Sexually Violent Predator designation is punishment.
Explore Case
1 2 3 4 5 … 27

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