Wentworth by-election may refer to:
1882 Wentworth colonial by-election, for the New South Wales Legislative Assembly electorate of Wentworth 1887 Wentworth colonial by-election, for the New South Wales Legislative Assembly electorate of Wentworth 1933 Wentworth by-election, for the United Kingdom Parliament constituency of Wentworth 1956 Wentworth by-election, for the Australian House of Representatives seat of Wentworth 1981 Wentworth by-election, for the Australian House of Representatives seat of Wentworth 1995 Wentworth by-election, for the Australian House of Representatives seat of Wentworth 2018 Wentworth by-election, for the Australian House of Representatives seat of Wentworth