The1910 New South Wales state election involved 90electoral district returning one member each.^[1]

This was the first NSW election using asecond ballot system. All previous elections had used afirst past the post voting system, where a candidate might be elected with less than 50% of the vote especially where two or more similar candidates split the vote.^[a] Under the second ballot system, if a candidate failed to achieve at least 50% of the vote in an electorate, a run-off election would take place in the following weeks. In this election, 3 electorates proceeded to second round elections. AtDurham andSt Leonards the second round ballot was won by the leading candidate; however, atHastings and Macleay the support from the Labour Party saw the independent overtake sittingLiberal Reform member to take the seat. TheLabour Party fielded a candidate in every electorate, with the result that the only 3 uncontested seats,Broken Hill,Cobar andThe Murray, were all held by the Labour Party.^[1]

There were 15 seats that elected a member from a different party and a further 11 seats where the member retained the seat but changed party. For a comprehensive list, see1910 New South Wales state election § Changing seats.

The election saw the final demise of theProgressive Party, with the four surviving members,Gordon McLaurin (Albury),George Briner (Raleigh),Robert Levien (Tamworth) andRobert Donaldson (Wynyard) retaining their seats having campaigned as Independent Liberals.^[2][b]

• Edward O'Sullivan had wonBelmore at the 1907 election as a Former Progressive; however, he joined the Labour Party in 1909 and died in April 1910. Theby-election in May 1910 was won byPatrick Minahan (Labour) who retained the seat at the 1910 general election.

• John Norton (Independent) had won the1907 election for Darling Harbour; however, he resigned to stand as aSenator for NSW at the1910 federal election. Theby-election in April 1910 was won byJohn Cochran (Labour) who retained the seat at this election.

• Granville Ryrie had wonQueanbeyan at the 1907 election; however, he resigned to contest theseat of Werriwa at the1910 federal election. Theby-election in April 1910 was won byJohn Cusack (Labour) who retained the seat at the 1910 general election.

• Candidates of the 1910 New South Wales state election
• Members of the New South Wales Legislative Assembly, 1910–1913

• Results of New South Wales elections

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