The Poor Man's Guardian was a penny weekly newspaper published in London, England by Henry Hetherington from July 1831 to December 1835.
The Poor Man's Guardian was hugely influential upon the decision by the Whig government of Lord Melbourne to lower the tax to a point where newspapers could retail at 4d (1.5p).
The paper claimed that the newspaper stamp was a tax on knowledge; it had the significant motto 'Knowledge is power'.
Hetherington's paper was enormously successful and achieved sales of 15,000 copies a week all over the country despite being London-based.
Bronterre O'Brien, later a regular contributor to the Northern Star, edited the Poor Man's Guardian from 1832.