The Parliamentary Secretary to the Treasury is the official title of the most senior whip of the governing party in the Parliament of the United Kingdom.

Today, any official links between the Treasury and this office are nominal and the title of the office can be seen as a sinecure that allows the incumbent to draw a Government salary, attend Cabinet, and use a Downing Street residence, traditionally 12 Downing Street.

Until 1711, there was only one Secretary to the Treasury; however, in that year, a second position was created to help deal with the increasing workload.

The junior secretary post remained a substantive position working in the Treasury.

While the exact date on which this change occurred is disputed, it is agreed that the distinction was complete by 1830.