Ickornshaw Mill is a historic watermill in Cowling, a village in North Yorkshire, in England.
The cotton mill was constructed in 1791 by John Dehane, a local clergyman, who had received a large inheritance.
There was a pond at the rear which fed the waterwheel, but it was insufficient during periods of drought.
In 1820, John Halstead bought the mill, and built a larger reservoir at Cowloughton Dam on Ickornshaw Moor, to feed the millpond.
The mill escaped damage and continued to operate, while the reservoir was not rebuilt.