North Shore, an electoral district of the Legislative Assembly in the Australian state of New South Wales, has had two incarnations, the first from 1920 to 1927 as a five-member electorate, the second from 1981 to the present as a single-member electorate.
Alick Kay, who had been elected as an independent, resigned on 28 July 1926 to accept appointment to the Metropolitan Meat Board. Which party interest Kay supported was determined by the Clerk of the Assembly after considering the votes of the late member on any motion of censure. Kay had supported the Lang Government in votes of confidence in the Assembly, the clerk therefore declared Kay represented the interests of the Labor Party. Arthur Tonge had the most votes of the unsuccessful Labor candidates at the 1925 election and took his seat on 22 September 1926.
Arthur Cocks resigned on 14 February 1925 to accept appointment to the position of Agent-General for NSW in London. Between 1920 and 1927 the Legislative Assembly was elected using a form of proportional representation with multi-member seats and a single transferable vote (modified Hare-Clark). The Parliamentary Elections (Casual Vacancies) Act, provided that casual vacancies were filled by the next unsuccessful candidate "who represents the same party interest as the late member". As there were no unsuccessful candidates, Cocks was replaced by another Nationalist member, Alfred Reid, who took his seat on 24 March 1925.