People gather for a vigil in response to the death of a counter-demonstrator at the "Unite the Right" rally in Charlottesville, outside the White House in Washington.

The United States has witnessed a massive collapse in public faith in its institutions, according to a survey released Monday.

The last year has seen an aggregate 37 percent slump in trust across government, media, businesses and non-government organizations (NGOs) in the U.S., the 2018 Edelman Trust Barometer report said. Of all 28 countries measured, the U.S. saw the biggest fall by some margin.

The Edelman survey offers an annual snapshot of a country's trust in its four main institutions.

Its authors said the trust decline in the U.S. is the steepest ever measured among the "general population," and that among the "informed public" trust had also imploded.

"The United States is enduring an unprecedented crisis of trust," said Richard Edelman, president and CEO of the Edelman Trust, in the report.