The 1938 Kinross and Western Perthshire by-election was held on 21 December 1938. The by-election was held due to the resignation of the incumbent Unionist member of parliament Katharine Stewart-Murra

Kinross and Western Perthshire was a county constituency of the House of Commons of the Parliament of the United Kingdom from 1918 until 1983, representing, at any one time, a seat for one Member of P