1964–1968 The first election to the newly created
London Borough of Hounslow was held on 7 May 1964, ahead of the new council assuming its full powers on 1 April 1965. The election returned 48
Labour councillors and 12
Conservative councillors from 60 seats.
London borough councils at the time also included
aldermen, equal to one-sixth of the number of councillors, elected by the councillors from among themselves or other qualified persons. Several by-elections were subsequently held during the 1964–1968 term.
1968-1971 1971-1974 1974-1978 1978-1982 1982-1986 1986-1990 1990-1994 The by-election was called following the death of Cllr Henry North. The by-election was called following the resignations of Cllrs Valerie Marks and William Martin. The by-election was called following the resignation of Cllr Peter Leggett. The by-election was called following the death of Cllr Peter Caldwell. The by-election was called following the death of Cllr Edward Pauling.
1994-1998 The by-election was called following the resignation of Cllr Michael Hoban. The by-election was called following the resignation of Cllr Antony Louki.
1998-2002 The by-election was called following the resignation of Cllr Peter Nathan. The by-election was called following the resignation of Cllr Brian Price. The by-election was called following the resignation of Cllr Pamela Wharfe. The by-election was called following the death of Cllr Josephine Langton.
2002-2006 The by-election was called following the death of Cllr Walter Hill. The by-election was called following the death of Cllr John Gray. The by-election was called following the death of Cllr Roger Clarke. The by-election was called following the resignation of Cllr Sally Gilson. The by-election was called following the death of Cllr Premila Bhanderi.
2006-2010 The by-election was called following the resignation of Cllr Harley Buckner. The by-election was called following the death of Cllr Robert Kinghorn.
2010-2014 There were no by-elections.
2014-2018 The by-election was called following the resignation of Cllr
Ruth Cadbury MP. The by-election was called following the death of Cllr Sohan Sangha.
2018-2022 The by-election was called following the death of Cllr John Chatt. The by-election was called following the death of Cllr Rajinder Bath. The by-election was called following the death of Cllr Poonam Dhillon. The by-election was called following the resignation of Cllr Hina Kiani.
2022-2026 The by-election was called following the resignation of Cllr Adriana Gheorghe. The by-election was called following the resignation of Cllr Lara Parizotto. The by-election was called following the resignation of Cllr Noreen Kaleem. The by-election was called following the resignation of Cllr Rhys Williams. The by-election was called following the resignation of Cllr Balraj Sarai. The by-election was called following the death of Cllr Sukhbir Singh Dhaliwal. ==Notes==