The latest information on the Courts of New Zealand website showed that in 2016 the High Court at Rotorua held 11 jury trials while Tauranga held zero. The Rotorua District Court held 108 while the Tauranga District Court held 93.
Warren-Clark said information she'd received from the Electoral Commission revealed Rotorua had about 46,250 eligible jurors while Tauranga had about 124,100.
"It's an equity issue in terms of how often people are being called up," she said.
"People do have to do their civic duty but when there is a small population jurors are called on more often."
Warren-Clark said any potential changes would be difficult but the issue was an important one.
"It sounds like it would be an easy fix but it's actually not. It's part of our laws and regulations.
"I don't think it's the most important issue, I think homelessness and education and health are further up but this is a local issue which is serious for local businesses."
Meanwhile, Woon is continuing to look into the inequities between the loads on the Rotorua and Tauranga courts.