Edwin Chadwick (January 24, 1800 - July 6, 1890) was an English social reformer who is noted for his work to reform the Poor Laws and to improve sanitation and public health. Chadwick's Report on The Sanitary Condition of the Labouring Population of Great Britain, begun in 1839 and published in 1842, was researched and published at his own expense. A supplementary report was also published in 1843.