GLAAD was founded in 1985 in response to defamatory and sensationalized news coverage fo the HIV and AIDS epidemic.

GLAD, a legal and advocacy organization, was founded in 1978 in response to a sting operation which targeted gay men in Boston.

GLSEN was founded in 1990 by a group of teachers in Massachusetts who came together to improve an education system that too frequently allows its LGBTQ students to be bullied, discriminated against, or fall through the cracks.

The Human Rights Campaign Fund was founded by in 1980 as one of the first gay and lesbian political action committees in the United States.

Lambda Legal was founded in 1973 as the nation’s first legal organization dedicated to achieving full equality for lesbian and gay people.

The National LGBTQ Task Force was founded in 1973 and is the oldest LGBTQ advocacy group in the U.S.

Founded in 1973 after the simple act of a mother publicly supporting her gay son, PFLAG is the nation's largest family and ally organization.

The Human Rights Campaign has worked to support greater equality for LGBT Americans since 1980. The records of the Human Rights Campaign are now open for research at Cornell University.

The GLBT Historical Society collects, preserves, exhibits and makes accessible to the public materials and knowledge to support and promote understanding of LGBTQ history, culture and arts in all their diversity.

LGBTQ America: A Theme Study of Lesbian, Gay, Bisexual, Transgender, and Queer History is a publication of the National Park Foundation for the National Park Service and funded by the Gill Foundation. Each chapter is written and peer-reviewed by experts in LGBTQ Studies.

Timeline, student, and educator resources on LGBTQ history from GLSEN.

Background information about lesbian, gay, bisexual and transgender milestones in the United States.

OutHistory.org tells stories about people in the past who identified as lesbian, gay, bisexual, or transgender; and people who did not conform to dominant norms of sexuality and gender.

This mobile app aims to bring LGBT history to the world. Each day of the year presents the LGBTQ events of note that happened on that day.

Timeline of trans history from the Proud Trust.