After putting in transfer requests, Nsiala and Jon Nolan signed for Ipswich Town on 8 August 2018 for a combined fee of £2 million, reuniting with their former Grimsby and Shrewsbury manager Paul Hurst, with both players signing three-year contracts with the option of an additional year’s extension. He scored his first goal for the club in a 2–1 loss at Sheffield Wednesday on 25 August 2018, however he was later sent off in the same match. He made 24 appearances in all competitions during his first season at Portman Road, scoring once.
