The 1889 New South Wales colonial election was for 137 members representing 74 electoral districts. The election was conducted on the basis of a simple majority or first-past-the-post voting system. In this election there were 37 multi-member districts returning 100 members. In these multi-member districts each elector could vote for as many candidates as there were vacancies. 10 districts were uncontested. The average number of enrolled voters per seat was 1,955, ranging from Boorowa (1,142) to Canterbury (4,129).
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| | | colspan="2" | hold 4 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | Member changed to from | rowspan="2" colspan="3" style="text-align:center;" | |- | | | colspan="2" | Member changed to from |-
| | | colspan="2" | win 1 and gain 1 from | rowspan="2" colspan="3" style="text-align:center;" | (1 new seat) |- | | | colspan="2" | hold 1
| | | colspan="2" | gain 1 from , win 1 and<br>1 member changed from | colspan="3" style="text-align:center;" | (1 new seat) |-
Thomas Waddell had been elected as a Free Trade member at the 1887 election however changed to the Protectionist party for this election.
| | | colspan="2" | hold 2 | rowspan="2" colspan="3" style="text-align:center;" | (1 new seat) |- | | | colspan="2" | win 1 |-
| | | colspan="2" | hold 4 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 2 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 3 and win 1 | colspan="3" style="text-align:center;" | (1 new seat) |-
David Buchanan (Protectionist) won a seat in a by-election in May 1888 and unsuccessfully contested Balmain.
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| | | colspan="2" | hold 4 | colspan="3" style="text-align:center;" | |-
Joseph Abbott</includeonly> was nominated for both East Sydney and Wentworth, however he was elected unopposed for Wentworth before the poll for East Sydney.
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| | | colspan="2" | hold 1 | colspan="3" style="text-align:center;" | |- | | | colspan="2" | hold 1 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 2 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | win 1 and gain 1 from | colspan="3" style="text-align:center;" | (1 new seat) |-
The sitting member George Matheson (Free Trade) did not contest the election.
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| | | colspan="2" | gain from | colspan="3" style="text-align:center;" | |-
The sitting member Jack Want (Independent Free Trade) did not contest the election, having been elected for Paddington on 2 February.
| | | colspan="2" | gain from | colspan="3" style="text-align:center;" | |-
Edwin Turner (Free Trade) won the seat at a by-election in 1888 and retained it at this election.
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| | | colspan="2" | hold 2 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 1 and win 1 | colspan="3" style="text-align:center;" | (1 new seat) |-
| | | colspan="2" | gain from | colspan="3" style="text-align:center;" | |-
The sitting member Samuel Moore (Free Trade) did not contest the election.
| | | colspan="2" | hold 1 and win 1 | colspan="3" style="text-align:center;" | (1 new seat) |-
Charles Jeanneret (Free Trade) was the sitting member for Carcoar.
| | | colspan="2" | hold 1 and gain 1 from | colspan="3" style="text-align:center;" | |-
One of the sitting members Thomas O'Mara (Independent Protectionist) unsuccessfully contested East Sydney. The other sitting member was Henry Dawson (Protectionist).
<noinclude>John Bowes (Protectionist) was the sitting member for Morpeth.</noinclude>
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Thomas Browne (Protectionist) was a sitting member for Wentworth.
| | | colspan="2" | hold 2 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 2 | colspan="3" style="text-align:center;" | |- | | | colspan="2" | Member changed to from | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 1 | colspan="3" style="text-align:center;" | |- | | | colspan="2" | hold 1 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 1, win 1 and gain 1 from | colspan="3" style="text-align:center;" | (1 new seat) |-
| | | colspan="2" | hold 3 | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 2 | colspan="3" style="text-align:center;" | |- | | | colspan="2" | Member changed to from | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 1 and gain 1 from | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 3 and win 1 | colspan="3" style="text-align:center;" | (1 new seat) |-
William Allen (Protectionist) had won a seat at a by-election in 1888 however was unable to retain it at this election. John Neild had been elected as a Free Trade member in 1887 however changed to the Protectionist party for this election.
| | | colspan="2" | gain 2 from | rowspan="2" colspan="3" style="text-align:center;" | |- | | | colspan="2" | hold 2 |-
Peter Howe (Protectionist) won a seat at a by-election in 1888 and retained it at this election. William Schey had been elected as a Free Trade member in Redfern however changed to the Protectionist party for this election.
| | | colspan="2" | hold 2 and win 1 | colspan="3" style="text-align:center;" | (1 new seat) |-
| | | colspan="2" | hold 1 and gain 2 from | rowspan="2" colspan="3" style="text-align:center;" | |- | | | colspan="2" | hold 1 |-
| | | colspan="2" | hold 2 and win 1 | colspan="3" style="text-align:center;" | (1 new seat) |-
Sturt and Wilcannia were new seats split off from Wentworth which previously returned two members.
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| | | colspan="2" | hold 1 and gain 1 from | colspan="3" style="text-align:center;" | |-
One of the sitting members John McElhone (Free Trade) did not contest the election. Robert Fitzgerald (Protectionist) was the other sitting member
Wentworth previously returned two members, however it was split, with two new seats, Sturt and Wilcannia. One sitting member for Wentworth Joseph Abbott</includeonly> (Protectionist) was nominated for both Wentworth and East Sydney. The other member for Wentworth was Thomas Browne (Protectionist) who unsuccessfully contested Mudgee.
| | | colspan="2" | gain from | colspan="3" style="text-align:center;" | |-
| | | colspan="2" | hold 4 | colspan="3" style="text-align:center;" | |-
Wilcannia and Sturt were new seats split off from Wentworth which previously returned two members.
| | | colspan="2" | win 1 and gain 1 from | colspan="3" style="text-align:center;" | |-