The MULTIPLE MERCHANT PAYMENT PROCESSOR PLATFORM APPARATUSES, METHODS AND SYSTEMS (“MID-PLATFORM”) enable merchants to customize the way payments made to them are processed. For example, a computer-implemented MID-Platform receives a payment request associated with a site (e.g., a website) and identifies a site profile associated with the site. The site profile is associated with one or more account processors and one or more transaction preference rules for selecting one of the account processors. The MID-Platform processes information associated with the payment request according to one or more transaction preference rules to select one of the account processors. Then, the MID-Platform sends a payment processing request to the selected account processor.