"In This City" peaked at number thirty-five on the Billboard Alternative Songs chart.

[2] Popjustice made it their 'song of the day', saying "The band specialise in really smart synthy pop tunes with rapping in and when the choruses are this massive it's hard not to become slightly obsessed".

[3] The song was added to the upfront section of the playlist of BBC Radio 1 in the United Kingdom in August 2008 and the A-List the subsequent month.

In the United Kingdom, "In This City" debuted at number 80 on the UK Singles Chart on September 7, 2008 – for the week ending date September 13, 2008 – solely on downloads, and went on to peak at number five on the chart on September 28, 2008 – for the week ending date October 4, 2008 – becoming Iglu & Hartley's first and only top ten song in Britain.

In Ireland, the song peaked at number nine on the Irish Singles Chart.