The match will take place at Cobh's home, St Colman's Park.
Two days before United will face Limerick. A friendly against Kilkenny had originally been announced, but that was soon cancelled.
The Iron's Finalised Pre-Season Schedule:
14-07-05 - Grimsby Town (Lincs Cup) A - 7.30pm
16-07-05 - Brigg Town A - 3pm
18-07-05 - Limerick A - 7pm
20-07-05 - Cobh Ramblers A - 7.30pm
25-07-05 - Northampton Town H - 7pm
26-07-05 - Winterton Town A - 7pm
27-07-05 - Cambridge United H - 7pm
28-07-05 - Goole Town A - 7pm
30-07-05 - Scarborough A - 3pm