[1] In the 1989 local government reforms, it merged with Helensville Borough to create Rodney District.
[4] In the early 1980s the county experienced an economic and population boom.
The economy of Rodney during this period would be largely through meat cattle and other forms of agriculture.
[5] In 1989 as part of the local government reforms the county was abolished and replaced by Rodney District.
The borders would remain largely the same aside from the incorporation of Helensville Borough and Taupaki from the newly formed Waitakere City, and a slight change to the border at Mangawhai.