Company lists · Data refreshed September 2026

Top 25 Nonprofit advocacy organizations based in the United States

RevenueBase identified 243 company matches for nonprofit advocacy organizations associated with the United States as of September 2026 and tracks 3,132 professional contacts across them, including 1,207 with verified work emails. Washington is the largest hub.

This list covers company matches for nonprofit advocacy organizations associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built
243Companies
3,132Contacts tracked
1,207Verified emails
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The 25 largest nonprofit advocacy organizations based in the United States

Ranked by team size
Top 25 of 243 company matches for nonprofit advocacy organizations based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWashington, DC, United StatesHQ recorded Sep 20, 2026n/a375 contacts →

Exact match

“The League of Women Voters of the United States encourages informed and active participation in government, works to increase understanding of major public policy issues, and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202651-200195 contacts →

Exact match

“Public Citizen is a nonprofit consumer advocacy organization that champions the public interest – your interests – in the halls of power.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202651-200123 contacts →

Exact match

“Our mission is to resist Trump’s agenda by empowering local activist groups to make their Members of Congress listen.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchSan Francisco, CA, United StatesHQ recorded Sep 20, 202651-200119 contacts →

Exact match

“We are activists and members throughout the state.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchDenver, CO, United StatesHQ recorded Sep 20, 2026201-50079 contacts →

Exact match

“PIRG is an advocate for the public interest.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchAustin, TX, United StatesHQ recorded Sep 20, 202651-20072 contacts →

Exact match

“TFN is a statewide non-partisan, grassroots organization that is building an informed and effective movement working toward equality and social justice.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchNew York, NY, United StatesHQ recorded Sep 20, 202611-5069 contacts →

Exact match

“For more than 50 years, Advocates for Children of New York has played an important and unique role in New York's public education community.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202651-20067 contacts →

Exact match

“The Hub Project is a Washington D.C.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchCary, NC, United StatesHQ recorded Sep 20, 202651-20064 contacts →

Exact match

“The Hunt Institute is a strategic catalyst for transforming public education and securing our country’s future.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchAlbany, NY, United StatesHQ recorded Sep 20, 202611-5062 contacts →

Exact match

“Citizen Action of New York is a grassroots membership organization taking on big issues that are at the center of transforming American society.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchNew York, NY, United StatesHQ recorded Sep 20, 202611-5061 contacts →

Exact match

“Every day, children are harmed by America’s child welfare, juvenile justice, immigration, education, and healthcare systems.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202611-5058 contacts →

Exact match

“Alliance for Justice is a national association of over 120 organizations, representing a broad array of groups committed to progressive values and the creation of an equitable…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202611-5058 contacts →

Exact match

“Mission: CLASP's mission is to develop and advocate for policies at the federal, state and local levels that improve the lives of low income people.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202611-5053 contacts →

Exact match

“At CREW, we use aggressive legal actions, in-depth investigations, and innovative policy and reform work to achieve that vision.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchOakland, CA, United StatesHQ recorded Sep 20, 202611-5052 contacts →

Exact match

“Our kids deserve a future where they can reach their full potential with no limitations.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchSeattle, WA, United StatesHQ recorded Sep 20, 202611-5051 contacts →

Exact match

“Washington Conservation Action’s mission is to advocate for environmental progress and justice through actions that mobilize the public, elect champions for the environment, and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202611-5051 contacts →

Exact match

“Advocacy Associates specializes in strategic grassroots and advocacy approaches designed to address the individual needs of our clients - no cookie cutter approaches are allowed.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchCleveland, OH, United StatesHQ recorded Sep 20, 202611-5048 contacts →

Exact match

“Ohio Citizen Action organizes and mobilizes people to advocate for public interests.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchNew York, NY, United StatesHQ recorded Sep 20, 202611-5047 contacts →

Exact match

“We have fought for more than 40 years to protect civil rights and achieve lived equality for communities in need.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchMontpelier, VT, United StatesHQ recorded Sep 20, 202611-5045 contacts →

Exact match

“VPIRG’s mission is to promote and protect the health of Vermont’s people, environment and locally-based economy by informing and mobilizing individuals and communities across the…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchSuitland, MD, United StatesHQ recorded Sep 20, 202611-5044 contacts →

Exact match

“ONE POWERFUL FORCE UNITED TOGETHER ~ WE LEGISLATE, EDUCATE, ADVOCATE DECISION MAKERS FOR THE IMPROVED QUALITY-OF-LIFE AND ECONOMIC FAIRNESS TO SUPPORT THE WELL-BEING OF MILITARY…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchMclean, VA, United StatesHQ recorded Sep 20, 202611-5033 contacts →

Exact match

“Because we want to create a better society for our children and for their children, we are devoted to raising funds for organizations that promote the values we believe in.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchSacramento, CA, United StatesHQ recorded Sep 20, 20261-1029 contacts →

Exact match

“The League of Women Voters, a nonpartisan political organization, encourages informed and active participation in government, works to increase understanding of major public…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchWoodland Hills, CA, United StatesHQ recorded Sep 20, 202611-5025 contacts →

Exact match

“Professional Advocacy.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchBerkeley, CA, United StatesHQ recorded Sep 20, 202611-5022 contacts →

Exact match

“No single organization can win alone.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 243 nonprofit advocacy organizations based in the United States

See the full list, filter by size, metro and specialty, and access 1,207 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Nonprofit advocacy organizations based in the United States at a glance

As of Sep 20, 2026
38.5%Verified-email coverage
12.9Average contacts per company
1-10Median size (employees)
15.2%Largest-city concentration · Washington
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
157
11-50
68
51-200
13
201-500
4

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 243 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “nonprofit advocacy organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,207 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “nonprofit advocacy organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nonprofit advocacy organizations are there based in the United States?

RevenueBase identified 243 company matches for nonprofit advocacy organizations associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

League Of Women Voters tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most nonprofit advocacy organizations?

Washington leads with 37 company records, followed by Boston (9) and New York (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,207 professional contacts with verified work emails tracked across these 243 companies; direct dials are available where recorded.

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 SmartSearch, 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.