Including the US.
Much of commerce and daily life in the US uses a customary system of measurements that traces its origins to England, before the revolution.
In 1859 the UK adopted a reformed and rationalized system of weights and measures that was binding on itself and its Imperial possessions, including about a quarter of the Earth's surface at that time.
The US did not adopt that system. Although in 1959, the US and the Imperial system countries adopted a common definition of the yard in SI units.
There are extensive differences between the US customary and Imperial systems, especially in units of volume and in larger units of weight.
All of this is explained by the National Institute of Standards and Technology [NIST, a division of the US Department of Commerce [nist.gov]] in Appendix B "Units and Systems of Measurement Their Origin, Development, and Present Status" to their publication Handbook 44 "Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices" [PDF].
While we are correcting misconceptions, the SI system (often called metric) is lawful in the US, and has been so since 1866, and dominates several important activities, such as health care, and the military. What the US has not done, and probably will never do, is outlaw, the customary system.