Artturi Aleksanteri Leinonen (15 December 1888, Ylihärmä – 26 February 1963) was a Finnish schoolteacher, journalist, writer and politician.
He was a Member of the Parliament of Finland from 1936 to 1939 and again from 1944 to 1945, representing the Agrarian League.
[1] Leinonen was an enthusiastic supporter of the Lapua Movement, but opposed the organization after it took a more radical turn.
He helped prevent the Mäntsälä rebellion from escalating out of control.
[2] In 1935, Leinonen was sentenced to one month in prison under the Sedition Act for insulting Paavo Virkkunen.