100 Most Popular Non-governmental Organizations in United Kingdom 2026 — by Audience Size

How to read this list

Rank

Position in the Top 100, sorted by audience size from largest to smallest. Updated weekly.

Audience size

Estimated number of unique people in United Kingdom who actively engage with this audience, derived from anonymized search-behavior signals.

Country share

Share of the global audience that is active in United Kingdom. A higher value means the audience is more locally concentrated here.

Avg age

Average age in years across the people who engage with this audience in United Kingdom, derived from anonymized search-behavior signals. A dash means demographic data is not yet available.

Female share

Share of women among the people who engage with this audience in United Kingdom. 50% is gender-balanced; values above mean female-skewed, below mean male-skewed.

Ranking

Rank	Audience	Audience size	Country share	Avg age	Female share	Subtype
1	UUNICEF	1.6M	5.1%	46.4	65.9%	Non-governmental organization
2	IInternational Chamber of Commerce	1.3M	3.2%	42.6	55.5%	Non-governmental organization
3	AAmnesty International	1M	11.7%	45.4	66.0%	Non-governmental organization
4	SSave the Children	698k	9.5%	43.7	72.4%	Non-governmental organization
5	CChristian Aid	270k	85.2%	52.2	73.7%	Non-governmental organization
6	MMédecins Sans Frontières	239k	4.7%	47.4	66.0%	Non-governmental organization
7	IInternational Rescue Committee	231k	17.4%	49.3	69.7%	Non-governmental organization
8	CCampaign for Nuclear Disarmament	102k	10.0%	48.0	70.6%	Non-governmental organization
9	WWikiLeaks	96k	4.8%	42.1	40.0%	Non-governmental organization
10	GGreenpeace	91k	0.8%	43.0	61.0%	Non-governmental organization
11	CCommon Sense Media	90k	5.3%	35.7	37.9%	Non-governmental organization
12	NNational Autism Association	88k	20.7%	41.4	78.8%	Non-governmental organization
13	NNational Science Teachers Association	86k	6.1%	40.5	70.9%	Non-governmental organization
14	IInternational Fund for Animal Welfare	66k	12.8%	48.0	70.5%	Non-governmental organization
15	UUrban Land Institute	58k	16.1%	46.7	51.6%	Non-governmental organization
16	NNational Resident Matching Program	42k	6.0%	32.5	61.0%	Non-governmental organization
17	PPlan International	32k	4.6%	45.8	62.7%	Non-governmental organization
18	SStudent Doctor Network	31k	3.1%	35.6	72.6%	Non-governmental organization
19	PPolar Bears International	27k	13.3%	47.3	50.5%	Non-governmental organization
20	AAnti-Defamation League	24k	0.6%	24.6	30.2%	Non-governmental organization
21	MMarine Stewardship Council	20k	13.2%	43.5	50.7%	Non-governmental organization
22	SSPCA (HK) 香港愛護動物協會	19k	1.8%	31.7	75.9%	Non-governmental organization
23	AAmerican Civil Liberties Union	19k	10.1%	38.3	42.0%	Non-governmental organization
24	LL'Arche	18k	4.1%	52.3	84.6%	Non-governmental organization
25	SSocialist International	17k	4.4%	47.3	41.4%	Non-governmental organization

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Frequently asked questions

How is this list of the most popular non-governmental organizations compiled?

Rascasse aggregates anonymized search-behavior signals across United Kingdom and ranks each non-governmental organization by its estimated audience size. Only entries with at least 5 measured entities are listed.

How often is the list updated?

The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.

What is the largest non-governmental organization in United Kingdom?

UNICEF currently leads with an estimated audience of 1.6M people in United Kingdom.

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