| Institute of Electrical and Electronics Engineers (IEEE) |
501(c)(3) |
Piscataway, NJ |
$714 million |
| CFA Institute |
501(c)(6) |
Charlottesville, VA |
$462 million |
| Project Management Institute (PMI) |
501(c)(6) |
Newtown Square, PA |
$390 million |
| United States Pharmacopoeial Convention (USP) |
501(c)(3) |
Rockville, MD |
$357 million |
| College of American Pathologists (CAP) |
501(c)(6) |
Northfield, IL |
$299 million |
| American Dental Association (ADA) |
501(c)(6) |
Chicago, IL |
$237 million |
| Society for Human Resource Management (SHRM) |
501(c)(6) |
Alexandria, VA |
$233 million |
| Association of Public Health Laboratories |
501(c)(3) |
Bethesda, MD |
$142 million |
| American College of Surgeons (ACS) |
501(c)(3) |
Chicago, IL |
$141 million |
| American Academy of Pediatrics (AAP) |
501(c)(3) |
Itasca, IL |
$140 million |
| American Society of Mechanical Engineers (ASME) |
501(c)(3) |
New York, NY |
$136 million |
| American Society of Hematology (ASH) |
501(c)(3) |
Washington, DC |
$118 million |
| American Physical Society |
501(c)(3) |
College Park, MD |
$106 million |
| National Association of County and City Health Officals (NACCHO) |
501(c)(3) |
Washington, DC |
$101 million |
| American Institute of Physics (AIP) |
501(c)(3) |
College Park, MD |
$92 million |
| California Academy of Sciences |
501(c)(3) |
San Francisco, CA |
$89 million |
| Association for Computing Machinery |
501(c)(3) |
New York, NY |
$88 million |
| American Academy of Family Physicians |
501(c)(6) |
Leawood, KS |
$83 million |
| The Institute of Internal Auditors (IIA) |
501(c)(6) |
Lake Mary, FL |
$81 million |
| Council on Foreign Relations (CFR) |
501(c)(3) |
New York, NY |
$79 million |
| American College of Physicians (ACP) |
501(c)(3) |
Philadelphia, PA |
$75 million |
| American Speech-Language-Hearing Association (ASHA) |
501(c)(6) |
Rockville, MD |
$75 million |
| Association of State and Territorial Health Officials |
501(c)(3) |
Arlington, VA |
$74 million |
| The American Institute of Architects (AIA) |
501(c)(6) |
Washington, DC |
$70 million |
| American Veterinary Medical Association (AVMA) |
501(c)(6) |
Schaumburg, IL |
$68 million |
| American Academy of Ophthalmology (AAO) |
501(c)(6) |
San Francisco, CA |
$68 million |
| American Society of Health-System Pharmacists (ASHP) |
501(c)(6) |
Bethesda, MD |
$64 million |
| Radiological Society of North America (RSNA) |
501(c)(3) |
Oak Brook, IL |
$64 million |
| Optical |
501(c)(3) |
Washington, DC |
$61 million |
| American Society of Anesthesiologists (ASA) |
501(c)(6) |
Schaumburg, IL |
$58 million |
| American Psychiatric Association (APA) |
501(c)(6) |
Washington, DC |
$58 million |
| American Library Association (ALA) |
501(c)(3) |
Chicago, IL |
$54 million |
| Association for Talent Development |
501(c)(3) |
Alexandria, VA |
$53 million |
| American Academy of Dermatology |
501(c)(3) |
Rosemont, IL |
$53 million |
| American Academy of Orthopedic Surgeons (AAOS) |
501(c)(3) |
Rosemont, IL |
$53 million |
| American Society of Civil Engineers (ASCE) |
501(c)(3) |
Reston, VA |
$53 million |
| American Physical Therapy Association (APTA) |
501(c)(6) |
Alexandria, VA |
$51 million |
| Iste Ascd Isteascd Edsurge |
501(c)(3) |
Arlington, VA |
$46 million |
| Association of The United States Army |
501(c)(3) |
Arlington, VA |
$45 million |
| American Society of Nephrology (ASN) |
501(c)(3) |
Washington, DC |
$42 million |
| International Association of Chiefs of Police |
501(c)(3) |
Alexandria, VA |
$42 million |
| National Council of Architectural Registration Boards (NCARB) |
501(c)(6) |
Washington, DC |
$40 million |
| American Physiological Society (APS) |
501(c)(3) |
Rockville, MD |
$40 million |
| American College of Rheumatology |
501(c)(6) |
Atlanta, GA |
$37 million |
| American Urological Association Education and Research |
501(c)(3) |
Linthicum HTS, MD |
$35 million |
| American Osteopathic Association (AOA) |
501(c)(3) |
Chicago, IL |
$35 million |
| Association of periOperative Registered Nurses (AORN) |
501(c)(6) |
Denver, CO |
$35 million |
| Water For People |
501(c)(3) |
Greenwood Village, CO |
$35 million |
| American Public Works Association |
501(c)(3) |
Kansas City, MO |
$34 million |
| Pennsylvania Horticultural Society (PHS) |
501(c)(3) |
Philadelphia, PA |
$34 million |
| American Association of Nurse Practitioners |
501(c)(6) |
Austin, TX |
$32 million |
| Infectious Diseases Society of America (IDSA) |
501(c)(6) |
Arlington, VA |
$32 million |
| Water Environment Federation (WEF) |
501(c)(3) |
Alexandria, VA |
$31 million |
| American Association for Justice (AAJ) |
501(c)(6) |
Washington, DC |
$31 million |
| Oncology Nursing Society |
501(c)(6) |
Pittsburgh, PA |
$31 million |
| American Gastroenterological Association Institute |
501(c)(3) |
Bethesda, MD |
$30 million |
| American College of Cardiology (ACC) |
501(c)(6) |
Washington, DC |
$29 million |
| International Citycounty Management Association |
501(c)(3) |
Washington, DC |
$29 million |
| The Council of Insurance Agents and Brokers |
501(c)(6) |
Washington, DC |
$29 million |
| American Retirement Association (ASPPA) |
501(c)(6) |
Arlington, VA |
$29 million |
| American College of Gastroenterology (ACG) |
501(c)(3) |
North Bethesda, MD |
$28 million |
| International Association for the Study of Lung Cancer |
501(c)(3) |
Denver, CO |
$28 million |
| National Association of Secondary -school Principals (NASSP) |
501(c)(3) |
Reston, VA |
$28 million |
| Catholic Health Association of the United States |
501(c)(3) |
Saint Louis, MO |
$27 million |
| Council of Chief State School Officers |
501(c)(3) |
Washington, DC |
$27 million |
| Institute of Food Technologists (IFT) |
501(c)(3) |
Chicago, IL |
$27 million |
| Endocrine Society |
501(c)(3) |
Washington, DC |
$27 million |
| American Institute of Aeronautics and Astronautics (AIAA) |
501(c)(3) |
Reston, VA |
$27 million |
| American Society for Engineering Education |
501(c)(3) |
Washington, DC |
$26 million |
| Council for Professional Recognition |
501(c)(3) |
Washington, DC |
$26 million |
| American Society of Radiologic Technologists (ASRT) |
501(c)(6) |
Albuquerque, NM |
$26 million |
| Inteleos (ARDMS) |
501(c)(6) |
Rockville, MD |
$26 million |
| American Society for Quality |
501(c)(3) |
Milwaukee, WI |
$26 million |
| American Association of Orthopaedic Surgeons (AAOS) |
501(c)(6) |
Rosemont, IL |
$25 million |
| Educause |
501(c)(3) |
Boulder, CO |
$25 million |
| American Society for Radiation Oncology (ASTRO) |
501(c)(6) |
Arlington, VA |
$25 million |
| American Association for Clinical Chemistry (AACC) |
501(c)(3) |
Washington, DC |
$24 million |
| Asis International |
501(c)(6) |
Alexandria, VA |
$24 million |
| American Association of Orthodontists |
501(c)(6) |
Saint Louis, MO |
$24 million |
| American Society of Association Executives |
501(c)(6) |
Washington, DC |
$24 million |
| National Association for the Education of Young Children |
501(c)(3) |
Washington, DC |
$24 million |
| International Masonry Training and Education Foundation (IMTEF) |
501(c)(3) |
Bowie, MD |
$24 million |
| Society of Critical Care Medicine |
501(c)(3) |
MT Prospect, IL |
$24 million |
| Texas Medical Association (TMA) |
501(c)(6) |
Austin, TX |
$23 million |
| LeadingAge WA |
501(c)(3) |
Washington, DC |
$23 million |
| Association of Social Work Boards |
501(c)(3) |
Culpeper, VA |
$23 million |
| Community Health Accreditation Partner |
501(c)(3) |
Arlington, VA |
$22 million |
| Casualty Actuarial Society (CAS) |
501(c)(6) |
Arlington, VA |
$22 million |
| American Occupational Therapy Association (AOTA) |
501(c)(6) |
Bethesda, MD |
$21 million |
| Association for Professional In Infection Control and Epidemology |
501(c)(3) |
Arlington, VA |
$21 million |
| Physicians Committee for Responsible Medicine (PCRM) |
501(c)(3) |
Washington, DC |
$21 million |
| American Association of Colleges of Osteopathic Medicine (AACOM) |
501(c)(3) |
Bethesda, MD |
$21 million |
| Risk and Insurance Management Society (RIMS) |
501(c)(6) |
New York, NY |
$21 million |
| American Immigration Lawyers Association (AILA) |
501(c)(6) |
Washington, DC |
$20 million |
| Association of Zoos and Aquariums |
501(c)(3) |
Silver Spring, MD |
$20 million |
| Heart Rhythm Society (HRS) |
501(c)(3) |
Washington, DC |
$20 million |
| Institute of Management Accountants |
501(c)(3) |
Montvale, NJ |
$20 million |
| American Association of School Administrators (AASA) |
501(c)(3) |
Alexandria, VA |
$20 million |
| Drug Information Association |
501(c)(3) |
Washington, DC |
$19 million |
| Society of Women Engineers |
501(c)(3) |
Chicago, IL |
$19 million |
| American Association of Blood Banks (AABB) |
501(c)(3) |
Bethesda, MD |
$19 million |
| American Industrial Hygiene Association (AIHA) |
501(c)(6) |
Falls Church, VA |
$18 million |
| American Meteorological Society |
501(c)(3) |
Boston, MA |
$18 million |
| Academy of Management (AOM) |
501(c)(3) |
Valhalla, NY |
$18 million |
| Association of Women's Health Obstetric and Neonatal Nurses (AWHONN) |
501(c)(3) |
Washington, DC |
$18 million |
| Pharmacy Technician Certification Board (PTCB) |
501(c)(6) |
Washington, DC |
$17 million |
| The American Academy of Allergy Asthma (AAAAI) |
501(c)(3) |
Milwaukee, WI |
$17 million |
| International Society of Automation (ISA) |
501(c)(3) |
Durham, NC |
$17 million |
| Association of Diabetes Care and Education Specialists |
501(c)(6) |
Chicago, IL |
$16 million |
| American Society of Addiction Medicine / Colorado |
501(c)(3) |
Rockville, MD |
$16 million |
| Society of Nuclear Medicine and Molecular Imaging (SNMMI) |
501(c)(3) |
Reston, VA |
$16 million |
| Regulatory Affairs Professionals Society (RAPS) |
501(c)(3) |
Rockville, MD |
$16 million |
| Pa Education Association |
501(c)(3) |
Washington, DC |
$16 million |
| Academy of General Dentistry (AGD) |
501(c)(6) |
Chicago, IL |
$16 million |
| International Association of Fire Chiefs (IAFC) |
501(c)(3) |
Mclean, VA |
$16 million |
| American Academy of Actuaries |
501(c)(6) |
Washington, DC |
$16 million |
| American Counseling Association |
501(c)(3) |
Alexandria, VA |
$16 million |
| American College of Radiology (ACR) |
501(c)(6) |
Reston, VA |
$16 million |
| American Marketing Association |
501(c)(3) |
Chicago, IL |
$15 million |
| Accreditation Board for Engineering and Technology |
501(c)(3) |
Baltimore, MD |
$15 million |
| Society of Interventional Radiology (SIR) |
501(c)(6) |
Fairfax, VA |
$15 million |
| National Association of Student Financial Aid Administrators |
501(c)(3) |
Washington, DC |
$14 million |
| School Nutrition Association (SNA) |
501(c)(4) |
Arlington, VA |
$14 million |
| American Academy of Child and Adolescent Psychiatry |
501(c)(3) |
Washington, DC |
$14 million |
| American Council on the Teaching of Foreign Languages |
501(c)(3) |
Alexandria, VA |
$14 million |
| American Society for Biochemistry and Molecular Biology |
501(c)(3) |
Rockville, MD |
$13 million |
| The Association for Research in Vision and Ophthalmology |
501(c)(3) |
Rockville, MD |
$13 million |
| Association of Community Cancer Centers (ACCC) |
501(c)(3) |
Rockville, MD |
$13 million |
| American Educational Research Association |
501(c)(3) |
Washington, DC |
$12 million |
| American College of Healthcare Executives (ACHE) |
501(c)(6) |
Chicago, IL |
$12 million |
| American Association of Physicists in Medicine (AAPM) |
501(c)(3) |
Alexandria, VA |
$12 million |
| American Association of Collegiate Registrars and Admissions Officers |
501(c)(3) |
Washington, DC |
$11 million |
| Public Relations Society of America / Group Central |
501(c)(6) |
New York, NY |
$11 million |
| American Association of Nurse Anesthetists |
501(c)(6) |
Rosemont, IL |
$11 million |
| American School Counselor Association (ASCA) |
501(c)(3) |
Alexandria, VA |
$11 million |
| Association of Fundraising Professionals (AFP) |
501(c)(6) |
Arlington, VA |
$11 million |
| Asm International |
501(c)(3) |
Materials Park, OH |
$11 million |
| Association of Home Appliance Manufacturers (AHAM) |
501(c)(6) |
Washington, DC |
$10 million |
| National League for Nursing |
501(c)(3) |
Washington, DC |
$10 million |
| American Health Lawyers Association (AHLA) |
501(c)(3) |
Washington, DC |
$10 million |
| The American Geriatrics Society |
501(c)(3) |
New York, NY |
$9.9 million |
| Arthroscopy Association of North America |
501(c)(3) |
Rosemont, IL |
$8.9 million |
| American Academy of Otolaryngology - Head and Neck Surgery (AAO-HNS) |
501(c)(6) |
Alexandria, VA |
$8.7 million |
| The New York State Society of Certified Public Accountants |
501(c)(6) |
New York, NY |
$8.7 million |
| American Society for Nutrition |
501(c)(3) |
Rockville, MD |
$8.4 million |
| Certified Financial Planner Board of Standards Center for Financial Planning |
501(c)(3) |
Washington, DC |
$8.3 million |
| National Quality Forum |
501(c)(3) |
Washington, DC |
$8.2 million |
| National Association of Elementary School Principals (NAESP) |
501(c)(6) |
Alexandria, VA |
$8.0 million |
| National Institute of Governmental Purchasing |
501(c)(3) |
Reston, VA |
$7.9 million |
| Public Affairs Council |
501(c)(4) |
Washington, DC |
$7.6 million |