Según la [[Office for National Statistics|Oficina Nacional de Estadística británica]], Darwen tiene una superficie de 7,58 [[Kilómetro cuadrado|km²]].<ref name="ONS">Tablas: «KS01 Usual resident population», «KS02 Age structure», «KS04 Marital status», «KS05 Country of birth», «KS06 Ethnic group», «KS07 Religion», «KS16 Household spaces and accommodation type» y «KS20 Household composition», disponiblesen para''Census descargar2001: Key Statistics for urban areas in England and Wales'' ([http://www.ons.gov.uk/ons/rel/census/census-2001-key-statistics/urban-areas-in-england-and-wales/indexurban-areas-in-england-and-wales-part-1.pdf 1], [http://www.ons.gov.uk/ons/rel/census/census-2001-key-statistics/urban-areas-in-england-and-wales/urban-areas-in-england-and-wales-part-2.pdf 2] y [http://www.ons.gov.uk/ons/rel/census/census-2001-key-statistics/urban-areas-in-england-and-wales/urban-areas-in-england-and-wales-part-3.htmlpdf aquí3]). [[Office for National Statistics]] (en inglés).</ref>
