US authorities are near a deal with Crédit Agricole in which the French bank would pay as much as $1 billion to settle an investigation into its business with blacklisted nations, The Post has learned.

Along with other foreign banks, Crédit Agricole is being probed over whether it enabled sanctioned countries, including Sudan, Cuba and Iran, to make trades and financial transactions through its US-dollar-clearing operations.

The Department of Justice is leading the investigation, along with the US Treasury, the Manhattan District Attorney’s Office and New York’s Department of Financial Services.

The bank is expected to agree to a settlement by the end of the month, although some aspects of the deal are still being discussed, according to a person briefed on the negotiations.

It’s not clear whether Crédit Agricole will have to admit to wrongdoing as part of the settlement or, like other banks that have broken trade embargoes, have certain operations suspended, the person said.

Crédit Agricole would be the latest foreign bank dinged for doing business with rogue countries.

Last June, fellow French bank BNP Paribas forked over $8.9 billion in fines and penalties and suspended some of its dollar-clearing operations as well after acknowledging wrongdoing.

“If sanctions are to have teeth, violations must be punished,” said Eric Holder, who was Attorney General at the time.

Credit Suisse, Barclays, Standard Chartered and ABN Amro have also paid fines for violating sanctions against the countries. Société Générale is also being investigated.

Spokespeople for Crédit Agricole didn’t respond to a request for comment.