One Nation will have two seats in the NSW upper house joining a mixed bag of crossbenchers who now hold the balance of power in the state's Legislative Assembly.
But former Senator David Leyonhjelm missed out on a state upper house spot when the final preferences were distributed on Monday afternoon.
Instead the last available seat went to One Nation candidate Rod Roberts who's a former detective from Goulburn.
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Mr Roberts will join former federal Labor leader and NSW One Nation leader Mark Latham at Macquarie Street when parliament resumes in May.
The second last seat was won by Animal Justice Party candidate Emma Hurst.
The Liberal-National coalition government won eight of the 21 upper house seats up for grabs in the March 23 election while Labor snared seven.
