Francis Samuel Williamson (18 January 1865 – 6 February 1936) was an Australian poet who was published under the name Frank S.

As a young man Williamson had written verse of small merit, but in middle life for a short period he appears to have been inspired by the scenery of his native country to do better work which he polished with great care.

The new book of poetry contained fifty-five poems and was published with a foreword by Sir John Latham, the Chief Justice of the High Court of Australia.

Some of the poems in this volume have the true touch and have been deservedly included in several anthologies of Australian verse.

Percival Serle considered him a strange case of an educated man writing a fair amount of verse of small merit until in middle life 'something blossomed in him and he wrote half a dozen quite beautiful poems'.