- Source: 1940 TANFL season
The 1940 TANFL season was the 59th season of the Tasmanian Australian National Football League (TANFL), the highest-level senior Australian rules football competition in southern Tasmania.
North Hobart won the TSL premiership for the 14th time and the third year in a row, defeating Cananore by 57 points in the 1940 TANFL Grand Final.
Ladder
Source: Rules for classification: 1) points; 2) percentage; 3) number of points for. (P) Premiers
Finals
From 1929 until 1941, the TANFL home-and-away season featured three rounds played for 4 premiership points per win, and two rounds played for 6 premiership points per win. A three-team system with challenge was then played, with the initial 1–3 positions based on premiership points, and the right of challenge going only to the team with the strictly best home-and-away season win-loss record.
= Semi-final
== Grand final
=Awards
Geoff Kilmartin (Cananore) won the William Leitch Medal as the TANFL's best and fairest player.
Jack Metherell (North Hobart) was the TANFL's leading goalkicker, finishing the season with 69 goals.
North Hobart won the Tasmanian State Premiership for the seventh time and the second year in a row, defeating Launceston (NTFA) by 56 points on 28 September 1940.