Derby County will be this summers hotest ticket in town at Bramall Lane.
The Blades will host SkyBet Championship side Derby County at Bramall Lane on Wednesday, 27th July, it will be the two clubs first meeting since United were relegated into League One during the 2010-11 campaign.
Further friendlies at Grimsby Town and Non-League opposition at Stocksbridge Park Steels and Handsworth Parramore.
This summer's schedule is as follows;
Stocksbridge Park Steels vs. Sheffield United
Saturday, 9th July 2016 - 3pm
Grimsby Town vs. Sheffield United
Saturday, 23rd July 2016 - 3pm
Sheffield United vs. Derby County
Wednesday, 27th July 2016 - 7.45pm
Handsworth Parramore vs. Sheffield United
Friday, 29th July 2016 - 7.45pm