A juror's oath

Oath

An oath is either a statement of fact or a promise calling upon something or someone that the oath maker considers sacred, usually God, as a witness to the binding nature of the promise or the truth of the statement of fact. To swear is to take an oath, to make a solemn vow...

is used to swear in jurors at the beginning of jury selection

Jury selection

Jury selection are many methods used to choose the people who will serve on a trial jury. The jury pool is first selected from among the community using a reasonably random method. The prospective jurors are then questioned in court by the judge and/or attorneys...

 or trial.

United States

In the United States, a federal juror's oath usually states something to the effect of, "Do you and each of you solemnly swear that you will well and truly try and a true deliverance make between the United States and ______, the defendant at the bar, and a true verdict render according to the evidence, so help you God?"

Jury instructions sometimes make reference to the juror's oath. For example, the Criminal Pattern Jury Instructions developed by the U.S. Court of Appeals for the 10th Circuit for use by U.S. District Courts state:

Australia

In a New South Wales

New South Wales

New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

 juror's oath, the juror promises to "...well and truly try and true deliverance make between our Sovereign Lady the Queen and the accused whom you shall have in charge, and a true verdict give according to the evidence."

In Western Australia

Western Australia

Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...

 each jury has a choice to either "swear by Almighty God" or "solemnly and sincerely declare and affirm" to "give a true verdict according to the evidence upon the issue(s) to be tried by me."

New Zealand

A New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

juror's oath reads: "Members of the jury: Do each of you swear by Almighty God (or solemnly, sincerely, and truly declare and affirm) that you will try the case before you to the best of your ability and give your verdict according to the evidence?"

France

According to the French Code of Penal Procedure, all jurors must individually swear to the following message from the judge presiding the court:

You swear and promise to examine with the most scrupulous attention the charges that will be laid against ; to betray neither the interests of the defendant, nor the interests of the society that accuses him, nor the interests of the victim; not to communicate with anybody until you [declare your verdict]; not to listen to hatred, malice, fear or affection; to remember that the defendant is presumed to be innocent and that doubt must benefit him; to decide for yourself according to the charges and the means of defense, according to your conscience and intimate conviction, with the impartiality and firmness that befits an honest and free person, and to keep the secret of the deliberations, even after you cease to be a juror.