List of best-selling singles of the 2010s in the United Kingdom

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For the purposes of calculating sales, a single is currently defined by the Official Charts Company (OCC) as either a 'single bundle' having no more than four tracks and not lasting longer than 25 minutes or one digital audio track not longer than 15 minutes with a minimum sale price of 40 pence.^[2] The rules have changed many times as technology has developed, the most notable being the inclusion of digital downloads in 2004 and of digital audio streaming in 2014. During the 2010s, sales of singles have been monitored by the OCC and compiled weekly as the UK Singles Chart.

Since July 2014, the UK Singles Chart has been based on streaming figures as well as physical/digital purchases, however the OCC still compiles a 'sales' (only) chart.^[3]