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).