The Union of Concerned Scientists is a science-based nonprofit working for a healthy environment and a safer world. UCS combines independent scientific research and citizen action to develop innovative, practical solutions and to secure responsible changes in government policy, corporate practices, and consumer choices. It began as a collaboration between students and faculty members at the Massachusetts Institute of Technology in 1969, and evolved to be an alliance of more than 250,000 citizens and scientists.

Contact details

Website:
http://www.ucsusa.org/

Address:
Two Brattle Sq. Cambridge, MA 02138-3780, USA

Country:
United States

Sub-region:
Northern America

Areas of focus

Geographics of focus
USA
Operating languages
English

Organisation details

Business model
Non-profit
Institutional affiliations
No affiliation
Year founded
1969
Age (years)
Union of Concerned Scientists
56 
United States average
 42
Global average
 32
Founded by
Founders: Henry Way Kendall | Kurt Gottfried
Founder gender: All male
Leadership
Leader(s) (2025): Gretchen Goldman
Leader gender: Female
Leader(s) (2024): Kim Waddell
Leader gender: Male
Leader(s) (2023): Johanna Chao Kreilick
Leader gender: Female
Staff size
2025
Union of Concerned Scientists
 222
United States average
 47
Global average
 88
2024
Union of Concerned Scientists
 224
2023
Union of Concerned Scientists
 217
% Female staff
2019
Union of Concerned Scientists
 66%
United States average
 46%
Global average
 43%

Organisational performance

Publications
2024
Union of Concerned Scientists
 24
United States average
 61
Global average
 57
2023
Union of Concerned Scientists
 17
2015
Union of Concerned Scientists
 57
Financials
2022
Union of Concerned Scientists
 $38,695,586
United States average
 $33,092,787
Global average
 $7,838,482,074
2015
Union of Concerned Scientists
 $26,546,024

Social

Facebook
Likes (2023)
Union of Concerned Scientists
 240,475
United States average
 65,411
Global average
 26,974
Likes (2022)
Union of Concerned Scientists
 238,672
Likes (2021)
Union of Concerned Scientists
 240,558
Twitter
Followers (2025)
Union of Concerned Scientists
 67,500
United States average
 50,826
Global average
 19,911
Followers (2024)
Union of Concerned Scientists
 73,700
Followers (2022)
Union of Concerned Scientists
 76,983
Subscribers (2025)
Union of Concerned Scientists
 12,200
United States average
 19,260
Global average
 7,443
Subscribers (2024)
Union of Concerned Scientists
 11,600
Subscribers (2023)
Union of Concerned Scientists
 11,100
Instagram
Followers (2025)
Union of Concerned Scientists
 23,400
United States average
 73,649
Global average
 18,610
Followers (2024)
Union of Concerned Scientists
 20,200
Followers (2023)
Union of Concerned Scientists
 19,000
Followers (2025)
Union of Concerned Scientists
 38,000
United States average
 24,319
Global average
 15,938
Followers (2024)
Union of Concerned Scientists
 32,000
Followers (2023)
Union of Concerned Scientists
 21,381

Data notes

Last updated: 20/03/2025
Rating of data accuracy (find out more) : OTT reviewed
Data sources consulted: Organisation´s website
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