A wedding invitation is a letter asking the recipient to attend a wedding. It is typically written in formal, third-person language and mailed five to eight weeks before the wedding date.

Like any other invitation, it is the privilege and duty of the host—historically, for younger brides in Western culture, the mother of the bride, on behalf of the bride's family—to issue invitations, either by sending them herself or causing them to be sent, either by enlisting the help of relatives, friends, or her social secretary to select the guest list and address envelopes, or by hiring a service. With computer technology, some are able to print directly on envelopes from a guest list using a mail merge with word processing andspreadsheet software.