Y Gwladgarwr ("The Patriot") (established in 1858) was a liberal Welsh language newspaper, published weekly and distributed around the districts of South Wales. Devoted to Welsh literature, the paper provided poets and authors of the valleys and South Wales with a means of publishing their works. Amongst the newspaper's poetry editors were William Williams (Caledfryn, 1801–1869) and William Thomas (Islwyn, 1832–1878).
Welsh Newspapers Online has digitised 1,266 issues of the Y Gwladgarwr (1858-1884) from the newspaper holdings of the National Library of Wales.