Foreign ownership of Western Australia's agricultural land has grown at the highest rate in the country.

The register of foreign ownership of agricultural land, released by Federal Treasurer Josh Frydenburg on Tuesday, revealed WA is a hotspot for foreign investment.

More than 16 per cent of WA's agricultural land is now owned, at least in part, by foreign interests. Credit:Jessica Shapiro

Foreign interests in WA farmland increased by about 6.9 per cent, or 890,000 hectares, from 2016-17 to 2017-18.

This means 13.7 million hectares of WA farmland has a level of foreign ownership; 16.4 per cent of the state's total agricultural land.