The Abortion Care Network (ACN) is a pro-abortion advocacy group that files amicus briefs in court cases and engages in public advocacy efforts related to preserving and extending legal protections for abortion in the United States.   
The Abortion Care Network is one of a number of abortion advocacy groups within the Alliance for Justice.  The Alliance for Justice is a left-of-center coalition of more than 100 organizations across the United States. The organization is most well known for the Judicial Selection Project, which promotes left-wing and Democratic-appointed judges while seeking to defeat the nominations of conversative and Republican-appointed judges. 
On February 5, 2018, ACN sponsored six billboards in the San Francisco Bay Area opposing the California Board of Registered Nursing’s approval of a continuing education course on medication abortion reversal.  On September 20, 2021, ACN filed an amicus brief in the U.S Supreme Court case, Dobbs v. Jackson Women’s Health Organization along with other pro-abortion and abortion-rights based organizations such as Bixby Center for Global Reproductive Health, Medical Students for Choice, National Abortion Federation, Physicians for Reproductive Health, and Planned Parenthood Federation of America. 
Abortion Care Network has received grants from numerous foundations across the United States. The David and Lucile Packard Foundation gave a $50,000 grant to the ACN in 2018 to support abortion providers.  The foundation gave a similar grant to ACN in 2020.  Arnold Ventures gave ACN a grant of $602,027 to support its work on contraceptive and abortion issues.  In 2020, ACN received grants from the Tara Health Foundation under its reproductive health and religious healthcare category. 
Nikki Madsen is the executive director of the Abortion Care Network.  She is also an author for politically left-leaning and feminist publications such as Ms.,  Bustle,  and Rewire News Group.