| Sam Lawn | |
| Assembly: | South Australian House of |
| Term Start: | 4 March 1950 |
| Term End: | 25 May 1971 |
| Predecessor: | Herbert George |
| Successor: | Jack Wright |
| Birth Name: | Samuel James Lawn |
| Birth Date: | 1906 5, df=yes |
| Birth Place: | Adelaide, South Australia |
| Party: | Australian Labor Party |
Samuel James Lawn (29 May 1906 - 25 May 1971) was an Australian politician who represented the South Australian House of Assembly seat of Adelaide for the Labor Party from 1950 to 1971.[1]