| Lajos Walko | |
| Order1: | Minister of Foreign Affairs of Hungary |
| Term Start1: | 5 March 1925 |
| Term End1: | 9 December 1930 |
| Primeminister1: | István Bethlen |
| Predecessor1: | Tibor Scitovszky |
| Successor1: | Gyula Károlyi |
| Term Start2: | 24 August 1931 |
| Term End2: | 1 October 1932 |
| Primeminister2: | Gyula Károlyi |
| Predecessor2: | Gyula Károlyi |
| Successor2: | Endre Puky |
| Birth Date: | 30 October 1880 |
| Birth Place: | Budapest, Austria-Hungary |
| Death Place: | Visegrád, People's Republic of Hungary |
| Profession: | politician |
| Party: | Unity Party |
Lajos Walko (30 October 1880 – 10 January 1954) was a Hungarian politician, who served as Minister of Foreign Affairs between 1925 and 1930. Around half year ago he was also appointed to this position. He worked for the Ministry of Finance. He served as interim Minister of Finance twice and Minister of Trade. As foreign minister he carried a considerable role the Horthy system happened to an external loan in his financial stabilisation. From 1938 he was the president of the Hungarian Commercial Bank in Budapest.