It achieved that by 2016, when the total reached 45.3 per cent.
Releasing the latest Gender Stocktake of State Sector Boards and Committees today, Minister for Women Julie Ann Genter said the Government was committed to increasing women in leadership across all boards in New Zealand and "we are leading by example".
"We will ensure half of all directors on state sector boards and committees are women by 2021.
"By making sure the public sector has equal representation at the top, we hope to inspire the private sector to lift its game.
"We're issuing a challenge across New Zealand to change current workplace cultures and support women into leadership roles, not just because that's the fair thing to do, but also because diversity helps organisations function more effectively."
The annual gender stocktake counts the appointments made by ministers to state sector boards and committees.
Across the 25 government agencies there are more than 430 boards and committees which make more than 2500 appointments each year.
The best-performing agencies in 2017 were Oranga Tamariki (62.1 per cent women), Internal Affairs (60.5 per cent) and Health (59.8 per cent).
Among the worst were Local Government (22.2 per cent), Racing (25 per cent) and Building and Construction (26.1 per cent).
Female representation on state sector boards and committees
2017 – 45.7%
2016 – 45.3%
2015 – 43.4%
2014 - 41.7%
2013 – 41.1%
2012 – 40.5%