Company lists · Data refreshed September 2026

Top 25 Humanitarian organizations based in Washington, United States

Name: Humanitarian organizations based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 65 companies tracked

RevenueBase identified 65 humanitarian organizations headquartered in Washington, United States as of September 2026 and tracks 33,858 professional contacts across them, including 7,873 with verified work emails. New York is the largest hub.

This list covers humanitarian organizations headquartered in Washington, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

65Companies

33,858Contacts tracked

7,873Verified emails

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The 25 largest humanitarian organizations based in Washington, United States

Ranked by team size

Top 25 of 65 humanitarian organizations based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to humanitarian organizations: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	American RED Cross	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	10001+	26,563 contacts →
	Indirect evidence “The American Red Cross prevents and alleviates human suffering in the face of emergencies by mobilizing the power of volunteers and the generosity of donors.” Source: RevenueBase Database · checked Sep 20, 2026
2	Project Hope	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	501-1,000	848 contacts →
	Indirect evidence “Founded in 1958, Project HOPE is a leader in global health development and emergency relief programs.” Source: RevenueBase Database · checked Sep 20, 2026
3	Women For Women International	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	518 contacts →
	Indirect evidence “In countries affected by conflict and war, Women for Women International supports the most marginalized women to earn and save money, improve health and well-being, influence…” Source: RevenueBase Database · checked Sep 20, 2026
4	IMA World Health	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	379 contacts →
	Indirect evidence “Founded in 1960, IMA World Health is a leading public health organization operating in some of the world’s most fragile settings.” Source: RevenueBase Database · checked Sep 20, 2026
5	Syrian American Medical Society Sams	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1,001-5,000	335 contacts →
	Indirect evidence “The Syrian American Medical Society (SAMS) was founded in 1998 in the United States as a professional society to provide networking, educational, cultural, and professional…” Source: RevenueBase Database · checked Sep 20, 2026
6	Immap INC	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	300 contacts →
	Strong evidence “iMMAP is an international nonprofit organization that provides information management services to humanitarian and development partners, enabling them to make informed decisions…” Source: RevenueBase Database · checked Sep 20, 2026
7	ANERA	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	290 contacts →
	Indirect evidence “Anera (American Near East Refugee Aid) advances the well-being of refugees, families and poor communities in Palestine and Lebanon.” Source: RevenueBase Database · checked Sep 20, 2026
8	Corus International	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	501-1,000	244 contacts →
	Strong evidence “Corus International is an ensemble of long-serving, global leaders in international development and humanitarian assistance committed to ending poverty and building healthy…” Source: RevenueBase Database · checked Sep 20, 2026
9	Plan International USA	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	188 contacts →
	Strong evidence “Plan International is an international development and humanitarian assistance nonprofit that advances children’s rights and equality for girls.” Source: RevenueBase Database · checked Sep 20, 2026
10	USA For Unhcr	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	162 contacts →
	Indirect evidence “USA for UNHCR helps and protects refugees and people displaced by violence, conflict and persecution.” Source: RevenueBase Database · checked Sep 20, 2026
11	NURU	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	n/a	159 contacts →
	Indirect evidence “Nuru is a global collective that enables inclusive and sustainable prosperity by identifying communities at the stability tipping point, strengthening rural livelihoods and market…” Source: RevenueBase Database · checked Sep 20, 2026
12	The Konterra Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	140 contacts →
	Strong evidence “At KonTerra, we support organizations that manage international development, humanitarian and emergency management operations.” Source: RevenueBase Database · checked Sep 20, 2026
13	Interaction	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	134 contacts →
	Indirect evidence “Convener.” Source: RevenueBase Database · checked Sep 20, 2026
14	Invisible Children INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	122 contacts →
	Indirect evidence “At Invisible Children, we work alongside central Africa's most remote and vulnerable communities to help them end violent conflict and recover from its impact.” Source: RevenueBase Database · checked Sep 20, 2026
15	Center For Civilians In Conflict	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	112 contacts →
	Indirect evidence “Center for Civilians in Conflict (CIVIC) is an international organization dedicated to promoting the protection of civilians caught in conflict.” Source: RevenueBase Database · checked Sep 20, 2026
16	Peace Winds	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	98 contacts →
	Indirect evidence “Peace Winds is a disaster preparedness, response and recovery organization.” Source: RevenueBase Database · checked Sep 20, 2026
17	Refugees International	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	68 contacts →
	Indirect evidence “We advocate for lifesaving assistance, human rights, and protection for displaced people and promotes solutions to displacement crises.” Source: RevenueBase Database · checked Sep 20, 2026
18	Airlink, INC	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	58 contacts →
	Strong evidence “Airlink is a Washington, DC-based global humanitarian organization that connects vetted nonprofits with aviation and logistics resources to deliver critical aid and emergency…” Source: RevenueBase Database · checked Sep 20, 2026
19	Nethope	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	54 contacts →
	Strong evidence “NetHope is a catalyst for collective impact that advances humanitarian, conservation, and international development efforts worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
20	Global Center On Cooperative Security	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	41 contacts →
	Indirect evidence “The Global Center on Cooperative Security is an international nongovernmental organization that advances human rights–centered responses to political violence, violent extremism…” Source: RevenueBase Database · checked Sep 20, 2026
21	The Halo Trust USA	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	30 contacts →
	Strong evidence “The HALO Trust is the world’s largest humanitarian landmine clearance organization.” Source: RevenueBase Database · checked Sep 20, 2026
22	Darfur Women Action Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “Darfur Women Action Group is a women-led, rights-based, anti-atrocities nonprofit organization with 501(c)(3) status founded in 2009 by Darfuri genocide survivor Ms.” Source: RevenueBase Database · checked Sep 20, 2026
23	Team Rubicon Global	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	17 contacts →
	Indirect evidence “Team Rubicon Global supports the Team Rubicon Network by fostering the establishment and development of Team Rubicon country units and by facilitating the Team Rubicon Network to…” Source: RevenueBase Database · checked Sep 20, 2026
24	Gsmsg The Global Surgical And Medical Support Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	501-1,000	15 contacts →
	Indirect evidence “The Global Surgical and Medical Support Group (GSMSG) is a registered 501(c)3 charitable non-profit dedicated to providing top-tier surgical and medical services for free in…” Source: RevenueBase Database · checked Sep 20, 2026
25	USA For IOM	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “USA for IOM, the U.S.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: humanitarian organizations. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names humanitarian organizations.
Partial evidence: Its own public description names part of humanitarian organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name humanitarian organizations. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 65 humanitarian organizations based in Washington, United States

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Humanitarian organizations based in Washington, United States at a glance

As of Sep 20, 2026

23.3%Verified-email coverage

520.9Average contacts per company

11-50Median size (employees)

147.7%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 65 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among humanitarian organizations, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Washington, United States whose own description of what they do matches “humanitarian organizations”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names humanitarian organizations), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among humanitarian organizations, and records with no verified work email. Companies headquartered outside Washington are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 7,873 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Humanitarian organizations by metro in the United States

Humanitarian organizations in New York96
Humanitarian organizations in Washington65
Humanitarian organizations in Los Angeles29

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names humanitarian organizations, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many humanitarian organizations are there based in Washington, United States?

RevenueBase identified 65 humanitarian organizations headquartered in Washington, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

American RED Cross, headquartered in Washington, tops this list with the largest team on record.

Which city has the most humanitarian organizations?

New York leads with 96 headquartered companies, followed by Washington (65) and Los Angeles (29).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 7,873 verified decision-maker contacts tracked across these 65 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.