The Royal Mail coach, (also known as the post coach or mail coach) was a horse-drawn carriage that carried mail deliveries. The coach was drawn by four horses and had seating for four passengers inside. Further passengers were later allowed to sit outside with the driver. The mail was held in a box to the rear, where a Royal Mail post office guard stood.

The mail coach was faster than the stage coach as it only stopped for delivery of mail and generally not for the comfort of the passengers. They were introduced in the 1780s and slowly phased out during the 1840s and 1850s, being replaced by trains as the railway network expanded.