| Honorific-Prefix: | Mr |
| John Cowan | |
| Honorific-Suffix: | MLC |
| Member for Southern District | |
| Office1: | Member of the South Australian Legislative Council |
| Birth Date: | 14 August 1893 |
| Birth Place: | Murray Bridge, South Australia |
| Death Place: | Adelaide, South Australia |
| Nationality: | Australian |
| Spouse: | Florence Annie Maud Yates |
| Party: | Liberal and Country League |
| Relations: | Thomas Cowan (grandfather) James Cowan (great-uncle) John Cowan (father) |
| Children: | 2 sons and 2 daughter |
| Residence: | Murray Bridge, South Australia |
| Alma Mater: | Prince Alfred College |
| Occupation: | Farmer |
John Lancelot Cowan (14 August 1893 – 19 May 1971) served as one of the 4 members for the District of Southern Districts in the South Australian Legislative Council from 26 May 1949 to 28 February 1959.
Cowan who was born in Murray Bridge, South Australia, was the eldest son of John Cowan, a pastoralist and parliamentarian, and his wife Elizabeth, née Jones. He was educated at Prince Alfred College and served in the First Australian Imperial Force.[1] In 1920, Cowan married Florence Yates.[2] [3]
Cowan served as a councillor on the District Council of Mobilong from 1927 to 1949, and was chairman of the council from 1932 to 1949.[4] He also served as the President of the Local Government Association of South Australia. In 1944, he unsuccessfully contested the House of Assembly seat of Murray.[5] Cowan was elected unopposed to the Legislative Council on 26 May 1949,[6] and retired during his second term on 28 February 1959.[7] [8]