The Institute of World Politics

Capital Research Center (CRC) is an American conservative non-profit organization located in Washington, D.C. Its stated purpose is "to study non-profit organizations, with a special focus on reviving the American traditions of charity, philanthropy, and voluntarism." According to The Washington Post, it also discourages donations by corporations and non-profits supporting what it sees as liberal or anti-business policies. It monitors the giving of major liberal donors in the U.S.

The Edlavitch Jewish Community Center of Washington, D.C. (formerly the Washington DCJCC) is a Jewish Community Center located in the historic district of Dupont Circle. It serves the Washington, D.C. area through religious, cultural, educational, social, and sport center programs open to the public, although many programs are strongly linked to Jewish culture, both in the United States and in Israel. It is part of the JCC Association (JCCA), the umbrella organization for the Jewish Community Center movement, which includes more than 350 JCCs, YM-YWHAs, and camp sites in the U.S. and Canada, in addition to 180 local JCCs in the Former Soviet Union, 70 in Latin America, 50 in Europe, and close to 500 smaller centers in Israel. Among the many notable programs sponsored by the EDCJCC are Theater J, a theater group that has hosted world premieres of plays by noted Jewish playwrights such as Wendy Wasserstein, Richard Greenberg, and Ariel Dorfman; the Washington Jewish Music Festival; the Jewish Literary Festival; and the Washington Jewish Film Festival, that includes screenings both at the Center itself, and at other Washington, DC, institutions, including a number of foreign embassies representing nations that produced the films. The EDCJCC also houses the Hyman S. and Freda Bernstein Library, which includes a Jewish Heritage Video Collection, a children's reading collection, and a collection of genealogy books and materials. It is a constituent organization of the Jewish Community Relations Council of Greater Washington, serving Washington, D.C., Maryland, and Virginia.

The DC Minyan is a lay-led Jewish congregation in the Dupont Circle area of Washington, D.C., with programs including Shabbat/Sabbath and Holy Day worship services, education, social events (for singles, couples, and families), retreats, and opportunities for tikkun olam, improving and transforming the world. The majority of its worship services, educational programs, and special events take place at the Washington, D.C. Jewish Community Center (DCJCC).The group was created with a dual commitment to halacha/Jewish law and egalitarianism. The leaders and members of the community seek to create "a warm and intellectually engaging community for prayer and study." Additionally, Beth Tritter, one of the group's four co-founders, states that the minyan has been able to create worship services that exhibit "ruach [spirit] and kavanah [spiritual focus]." The DC Minyan is part of a growing number of similar lay-led programs within the national and international Jewish community, such as New York's Kehilat Hadar and Jerusalem's Shira Hadasha and Kehilat Kedem, that are sometimes described as being part of "the independent minyan movement."The name, minyan, comes from the Hebrew word (מנין) for the prayer quorum traditionally required for a full Jewish prayer service.

Bet Mishpachah (Hebrew: בית משפחה) is a Jewish egalitarian worshiping community in the Dupont Circle area of Washington, D.C. It is one of a number of national and international Jewish communities of "LGBT affirming congregations" that specifically welcome and "embrace" the LGBT (Lesbian, Gay, Bisexual, and Transgender) community, along with all others who "wish to participate in an inclusive, egalitarian, and mutually supportive community." Membership is open to all singles, couples, and families, regardless of religious affiliation, sexual orientation, or gender identity.Sabbath worship services and most religious and educational programs are held at the Washington, D.C. Jewish Community Center (DCJCC).

Theater J is a professional theater company located in Washington, DC, founded to present works that "celebrate the distinctive urban voice and social vision that are part of the Jewish cultural legacy" as a self-mission.

Foundry United Methodist Church is a historic congregation of the United Methodist Church, located on 16th Street NW, Washington, D.C., and founded in 1814.

The Administration Building, Carnegie Institute of Washington is a Beaux-Arts style building designed by architects Carrere and Hastings, and located at 1530 P Street NW in Washington, D.C. It houses the Carnegie Institution for Science, a philanthropic scientific research organization founded in 1902 by Andrew Carnegie. In recognition of the building's architecture and its unique tenant, the building was declared a National Historic Landmark in 1965. The building was also designated a contributing property to the Sixteenth Street Historic District in 1978.

St. Luke's Episcopal Church is a historic Episcopal church located at 1514 15th Street, N.W., in Washington, D.C. Completed in 1879, it is home to the oldest African-American Episcopal congregation in the city. It was designated a U.S. National Historic Landmark in 1976 for its association with Rev. Alexander Crummell (1819–1898), a leading figure advocating black self-sufficiency and civil rights in the mid-19th century.St. Luke's continues as an active parish in the Episcopal Diocese of Washington. As of 2012, the Priest-in-Charge is the Rev. Ray D. Massenburg.

Stead Park is a 1.5-acre (0.61 ha) municipal park located in the Dupont Circle neighborhood of Northwest Washington, D.C. Among its facilities are Stead Recreation Center, located at 1625 P Street NW; a lighted basketball court; an athletic field with a 60-foot (18 m) baseball diamond; and a playground.Public events such as Summer Movie Mania, an outdoor screening sponsored by the city's government, are held at the park. Stead Park is also used as a practice field by the Washington Renegades RFC, the first rugby union club in the United States to recruit gay men and men of color.The park and its small staff are administered by the city's Department of Parks and Recreation. Stead Park, whose property was valued at $8,659,560 in 2009, is partially funded by a private trust created by Washington architect Robert Stead (1846-1943). The park is named for Stead's wife, Mary Force Stead.

The Cairo apartment building, located at 1615 Q Street NW in Washington, D.C., is a landmark in the Dupont Circle neighborhood and the District of Columbia's tallest residential building. Designed by architect Thomas Franklin Schneider and completed in 1894 as the city's first "residential skyscraper", the 164-foot (50 m)-tall brick building spurred local regulations and federal legislation limiting building height in the city that continue to shape Washington's skyline.Today, the Cairo is a condominium building, home to renters and owners of apartments ranging in size from small studios to multi-level two- and three-bedroom units.

The Robert Simpson Woodward House is a former residence located at 1513 16th Street, NW in the Dupont Circle neighborhood of Washington, D.C. From 1904 until 1914, it was a home of geologist Robert Simpson Woodward (1849–1924), the first president of the Carnegie Institution and a highly regarded scientist and science administrator. The building currently serves as the Capital Research Center headquarters. It was declared a National Historic Landmark in 1976 and designated a contributing property to the Sixteenth Street Historic District in 1978.

CTIA is a trade association representing the wireless communications industry in the United States. The association was established in 1984 and is headquartered in Washington, D.C. It is a 501(c)(6) nonprofit membership organization, and represents wireless carriers and suppliers, and manufacturers and providers of wireless products and services.CTIA operates certification programs for the wireless industry and publishes wireless industry surveys. It has also sponsored various public service initiatives related to wireless. It was originally known as the Cellular Telecommunications Industry Association until 2004, and later the Cellular Telecommunications and Internet Association. The organization has since operated under its initialism only, but subtitled as CTIA – The Wireless Association until 2015.