Embassy of Australia, Washington, D.C.

The National Geographic Society (NGS), headquartered in Washington, D.C., United States, is one of the largest non-profit scientific and educational organizations in the world.Founded in 1888, its interests include geography, archaeology, and natural science, the promotion of environmental and historical conservation, and the study of world culture and history. The National Geographic Society's logo is a yellow portrait frame—rectangular in shape—which appears on the margins surrounding the front covers of its magazines and as its television channel logo. Through National Geographic Partners (a joint venture with The Walt Disney Company), the Society operates the magazine, TV channels, a website, worldwide events, and other media operations.

The Charles Sumner School, established in 1872, was one of the earliest schools for African Americans in Washington, D.C. Named for the prominent abolitionist and United States Senator Charles Sumner, the school became the first teachers' college for black citizens in the city and the headquarters of its segregated school system for African American students. It currently houses a small museum, a research room, art exhibits, and the archives of the District of Columbia Public Schools.

The Somali Ambassador in Washington, D. C. is the official representative of the Government of in Mogadishu to the Government of the United States and Permanent Representative next the Headquarters of the United Nations.

The D.C. Women's Hall of Fame (also District of Columbia Women's Hall of Fame) was a project supported by the D.C. Commission for Women and meant to honor the achievements of women from the District of Columbia. Eight women were inducted into the hall of fame in its first year, 1988. Women were chosen for making "significant contributions in the fields of community and public service, education, health or labor." The hall of fame can be seen in the Dr. Mildred E. Gibbs lecture hall at the Charles Sumner School.

Students For Liberty (SFL) is an international libertarian non-profit organization with origins in the United States. Its stated mission is "to educate, develop, and empower the next generation of leaders of liberty." Formed in 2008 after a meeting at which students shared ideas and experiences about classical liberal student groups, SFL has since grown into a full organization with various programs and a network of affiliated student groups.The organization hosts an annual international conference as well as various regional conferences. As of 2014, the SFL network self-reported that it had a membership of 1,000 student organizations around the world. SFL's expansion is encouraged and supported by current students involved in its Campus Coordinators program.On August 1, 2016, Dr. Wolf von Laer became the chief executive officer.

The National Museum of Catholic Art and History is a museum in Washington, D.C., focusing on Catholic art. It was formerly located in East Harlem, Manhattan, New York City. It was founded by Christina Cox in 1995.

The American Council of Trustees and Alumni (ACTA) is a conservative non-profit organization whose stated mission is to "support liberal arts education, uphold high academic standards, safeguard the free exchange of ideas on campus, and ensure that the next generation receives a philosophically rich, high-quality college education at an affordable price." ACTA does so primarily by calling on trustees to take on a more assertive governing role. It is based in Washington, D.C. and its current president is Michael Poliakoff.

The Wilderness Society is an American non-profit land conservation organization that is dedicated to protecting natural areas and federal public lands in the United States. They advocate for the designation of federal wilderness areas and other protective designations, such as for national monuments. They support balanced uses of public lands, and advocate for federal politicians to enact various land conservation and balanced land use proposals. The Wilderness Society also engages in a number of ancillary activities, including education and outreach, and hosts one of the most valuable collections of Ansel Adams photographs at their headquarters in Washington, D.C.The Wilderness Society specializes in issues involving lands under the management of federal agencies; such lands include national parks, national forests, national wildlife refuges, and areas overseen by the Bureau of Land Management. In the early 21st century, the society has been active in fighting recent political efforts to reduce protection for America's roadless and undeveloped lands and wildlife. The organization was instrumental in the passage of the 1964 Wilderness Act. The Wilderness Act led to the creation of the National Wilderness Preservation System, which protects 109 million acres of U.S. public wildlands. As one of the largest conservationist organizations in the country, The Wilderness Society has contributed to nearly all major designations of lands to be entered into the wilderness system.

The American Federation of State, County and Municipal Employees (AFSCME) is the largest trade union of public employees in the United States. It represents 1.3 million public sector employees and retirees, including health care workers, corrections officers, sanitation workers, police officers, firefighters, and childcare providers. Founded in Madison, Wisconsin, in 1932, AFSCME is part of the AFL–CIO, one of the two main labor federations in the United States. AFSCME has had four presidents since its founding. The union is known for its involvement in political campaigns, almost exclusively with the Democratic Party. AFSCME was one of the first groups to take advantage of the 2010 Citizens United decision, which allowed unions and corporations to directly finance ads that expressly call for the election or defeat of a candidate. Major political issues for AFSCME include single-payer health care, protecting pension benefits, raising the minimum wage, preventing the privatization of government jobs, and extending unemployment benefits.According to their website, AFSCME is divided into approximately 3,400 local unions in 46 U.S. states, plus the District of Columbia and Puerto Rico.

The Puerto Rico Federal Affairs Administration (PRFAA)—Spanish: Administración de Asuntos Federales de Puerto Rico—is the executive agency of the government of Puerto Rico that represents the government of the island and its dependencies and municipalities before entities of or in the United States, including: The Federal Government of the United States Local and State Governments of the United States Public or Private Entities in the United StatesThe administration is similar to a State-Federal relations office and serves as the primary liaison between Puerto Rico's officials, the White House, Congress, and the federal agencies of the United States. Additionally, the office interacts with national organizations representing U.S. governors of other states such as the National Governors Association and the Southern Governors' Association. PRFAA also coordinates the lobbying efforts of the Puerto Rico executive branch in Washington, DC, and assists other Puerto Rican agencies and municipalities in grant-seeking efforts. The agency is also supposed to support the work of the Resident Commissioner of Puerto Rico but the relationship tends to be tumultuous when the governor and the resident commissioner come from different political parties. PRFAA's headquarters are located in Washington, D.C., at 1100 17th Street NW, while its Regional Office is located at 6925 Lake Ellenor Drive, Orlando, FL 32809.

The Club for Growth is a 501(c)(4) conservative organization active in the United States, with an agenda focused on cutting taxes and other economic policy issues. Club for Growth's largest funders are the billionaires Jeff Yass and Richard Uihlein. The club has two political arms: an affiliated traditional political action committee, called the Club for Growth PAC, and Club for Growth Action, an independent-expenditure only committee or Super-PAC.According to its website, the Club for Growth's policy goals include cutting income tax rates, repealing the estate tax, supporting limited government and a balanced budget amendment, entitlement reform (including Social Security reform, Medicare and Medicaid reform), free trade, tort reform, school choice, and deregulation. The group has opposed government action to curb greenhouse gas emissions. The Club for Growth PAC endorses and raises money for candidates who meet its standards for fiscal conservatism. According to Politico, "The Club for Growth is the pre-eminent institution promoting Republican adherence to a free-market, free-trade, anti-regulation agenda." The Guardian described the group as "one of the biggest backers" of Republicans who later voted to overturn the results of the 2020 United States presidential election, having spent around $20 million on their campaigns in 2018 and 2020.

The Jefferson, Washington, DC is a boutique hotel located at 1200 16th Street NW in Washington, D.C., in the United States. It has also been known as The Jefferson Hotel. It was built from 1922 to 1923, and was initially an apartment building. After housing war workers during World War II, the structure was converted to a hotel in 1954. It became better known after a 1980 renovation, and became a Washington landmark. It was sold in 1989, 2000, and 2005, and underwent a two-year, multimillion-dollar renovation that revealed the building's original atrium skylight. It reopened in 2009.