Company lists · Data refreshed September 2026

Top 25 Professional associations based in the United States

Name: Professional associations based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,494 companies tracked

RevenueBase identified 1,494 professional associations headquartered in the United States as of September 2026 and tracks 23,824 professional contacts across them, including 5,086 with verified work emails. New York is the largest hub.

This list covers professional associations headquartered in the 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

1,494Companies

23,824Contacts tracked

5,086Verified emails

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The 25 largest professional associations based in the United States

Ranked by team size

Top 25 of 1,494 professional associations based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to professional associations: 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 Dental Association	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	201-500	1,154 contacts →
	Partial evidence “The not-for-profit American Dental Association (ADA) is America's leading advocate for oral health.” Source: RevenueBase Database · checked Sep 20, 2026
2	Health Care Compliance Association Hcca	Strong evidence	Eden Prairie, MN, United StatesHQ checked Sep 20, 2026	n/a	1,036 contacts →
	Strong evidence “Established in 1996, Health Care Compliance Association® (HCCA)® supports healthcare compliance professionals as part of the overarching mission of SCCE & HCCA, a professional…” Source: RevenueBase Database · checked Sep 20, 2026
3	Associated Builders And Contractors	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	n/a	960 contacts →
	Indirect evidence “Founded on the merit shop philosophy, ABC and its 67 chapters nationwide help our members develop people, win work and deliver that work safely, ethically and profitably for the…” Source: RevenueBase Database · checked Sep 20, 2026
4	Professional Photographers Of America	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	n/a	666 contacts →
	Strong evidence “Professional Photographers of America (PPA) is the world's largest nonprofit association serving professional photographers.” Source: RevenueBase Database · checked Sep 20, 2026
5	MDRT	Strong evidence	Park Ridge, IL, United StatesHQ checked Sep 20, 2026	51-200	552 contacts →
	Strong evidence “MDRT (Million Dollar Round Table), The Premier Association of Financial Professionals®, is a global, independent association of the world's leading life insurance and financial…” Source: RevenueBase Database · checked Sep 20, 2026
6	Executive Director, INC	Strong evidence	Milwaukee, WI, United StatesHQ checked Sep 20, 2026	201-500	543 contacts →
	Strong evidence “EDI is a top company in association management, providing professional services for national and international medical, certification, and scientific associations.” Source: RevenueBase Database · checked Sep 20, 2026
7	Avma American Veterinary Medical Association	Partial evidence	Schaumburg, IL, United StatesHQ checked Sep 20, 2026	51-200	492 contacts →
	Partial evidence “The AVMA is the nation’s leading advocate for the veterinary profession.” Source: RevenueBase Database · checked Sep 20, 2026
8	Public Relations Society Of America Prsa	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	n/a	491 contacts →
	Indirect evidence “PRSA is where communicators stay ahead of what's actually landing on our desks: AI, crisis, misinformation, and reputation management.” Source: RevenueBase Database · checked Sep 20, 2026
9	American College Of Sports Medicine	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 20, 2026	n/a	373 contacts →
	Partial evidence “The American College of Sports Medicine (ACSM) exists to educate and empower professionals to advance the science and practice of health and human performance.” Source: RevenueBase Database · checked Sep 20, 2026
10	American Pharmacists Association	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	371 contacts →
	Strong evidence “The American Pharmacists Association (APhA) is the only organization advancing the entire pharmacy profession-helping pharmacists find success and satisfaction in their work while…” Source: RevenueBase Database · checked Sep 20, 2026
11	The Florida BAR	Partial evidence	Tallahassee, FL, United StatesHQ checked Sep 20, 2026	201-500	368 contacts →
	Partial evidence “The Florida Bar is the statewide professional organization of lawyers, and post information below that may be of interest to members without endorsing any positions or opinions.” Source: RevenueBase Database · checked Sep 20, 2026
12	NEW York State BAR Association	Strong evidence	Albany, NY, United StatesHQ checked Sep 20, 2026	51-200	305 contacts →
	Strong evidence “For more than 100 years, the New York State Bar Association has shaped the development of the law, educated and informed the profession and the public, and responded to the…” Source: RevenueBase Database · checked Sep 20, 2026
13	Best Lawyers	Partial evidence	Augusta, GA, United StatesHQ checked Sep 20, 2026	51-200	286 contacts →
	Partial evidence “Founded more than 40 years ago, Best Lawyers® was the first organization dedicated to recognizing excellence in the legal profession.” Source: RevenueBase Database · checked Sep 20, 2026
14	NEW York City BAR Association	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	278 contacts →
	Partial evidence “The New York City Bar Association is a voluntary organization with members.” Source: RevenueBase Database · checked Sep 20, 2026
15	NASPA	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	266 contacts →
	Strong evidence “NASPA is the leading association for the advancement, health, and sustainability of the student affairs profession.” Source: RevenueBase Database · checked Sep 20, 2026
16	American Osteopathic Association	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	252 contacts →
	Partial evidence “The American Osteopathic Association (AOA) represents more than osteopathic physicians (DOs) and osteopathic medical students; promotes public health; encourages and funds…” Source: RevenueBase Database · checked Sep 20, 2026
17	Regulatory Affairs Professionals Society Raps	Partial evidence	Rockville, MD, United StatesHQ checked Sep 20, 2026	51-200	247 contacts →
	Partial evidence “The Regulatory Affairs Professionals Society (RAPS) is the largest global organization of and for those involved with the regulation of healthcare and related products, including…” Source: RevenueBase Database · checked Sep 20, 2026
18	American Massage Therapy Association Amta	Strong evidence	Evanston, IL, United StatesHQ checked Sep 20, 2026	51-200	229 contacts →
	Strong evidence “The American Massage Therapy Association is the largest non-profit, professional association serving massage therapists, massage students and massage schools.” Source: RevenueBase Database · checked Sep 20, 2026
19	American Academy Of Physician Associates	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 20, 2026	51-200	227 contacts →
	Strong evidence “The American Academy of Physician Associates (AAPA) is the only national professional association that represents all PAs across all medical settings and specialties in all 50…” Source: RevenueBase Database · checked Sep 20, 2026
20	Appraisal Institute	Strong evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	221 contacts →
	Strong evidence “The Appraisal Institute is the leading professional association of real estate appraisers.” Source: RevenueBase Database · checked Sep 20, 2026
21	AOTA	Strong evidence	Bethesda, MD, United StatesHQ checked Sep 20, 2026	51-200	182 contacts →
	Strong evidence “The American Occupational Therapy Association (AOTA) is the national professional association established in 1917 to represent the interests and concerns of occupational therapy…” Source: RevenueBase Database · checked Sep 20, 2026
22	California Medical Association	Strong evidence	Sacramento, CA, United StatesHQ checked Sep 20, 2026	51-200	173 contacts →
	Strong evidence “The California Medical Association is a professional association representing more than California physicians (#CMAdocs) in all medical specialties and modes of practice.” Source: RevenueBase Database · checked Sep 20, 2026
23	Washington State BAR Association	Partial evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	51-200	172 contacts →
	Partial evidence “The Washington State Bar Association (WSBA) operates under the delegated authority of the Washington Supreme Court to license the state’s nearly lawyers and other legal…” Source: RevenueBase Database · checked Sep 20, 2026
24	Federation Of State Medical Boards	Indirect evidence	Euless, TX, United StatesHQ checked Sep 20, 2026	51-200	163 contacts →
	Indirect evidence “Since our founding in 1912, FSMB has served as a forum for connecting state medical and osteopathic boards to share best practices and discuss issues of medical regulation.” Source: RevenueBase Database · checked Sep 20, 2026
25	NASBA	Partial evidence	Nashville, TN, United StatesHQ checked Sep 20, 2026	51-200	159 contacts →
	Partial evidence “Founded in 1908, the National Association of State Boards of Accountancy (NASBA) has served as an association dedicated to enhancing the effectiveness and advancing the common…” 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: professional associations. 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 professional associations.
Partial evidence: Its own public description names part of professional associations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional associations. 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 1,494 professional associations based in the United States

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Professional associations based in the United States at a glance

As of Sep 20, 2026

21.3%Verified-email coverage

15.9Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

854

11-50

324

51-200

154

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,494 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 professional associations, 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 the United States whose own description of what they do matches “professional associations”. 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 professional associations), 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 professional associations, and records with no verified work email. Companies headquartered outside United States 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, 5,086 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.

Professional associations by metro

Professional associations in New York46
Professional associations in Chicago38
Professional associations in Washington38
Professional associations in Sacramento29

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 professional associations, 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 professional associations are there based in the United States?

RevenueBase identified 1,494 professional associations headquartered in the 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 Dental Association, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most professional associations?

New York leads with 46 headquartered companies, followed by Chicago (38) and Washington (38).

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 5,086 verified decision-maker contacts tracked across these 1,494 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.