Financial accounting and reporting standards in the United States are established primarily by the:

Financial Accounting standards Board (FASB)

Explanation:

Financial Accounting Standards Board (FASB) is a private body that works as a non-profit organization that main purpose is established accounting principles in the united states. FASB work for the government, private and for a non-profit organization to prepare and present their financial statement.

FASB working with international accounting standard boards for maintaining and preparing standards worldwide