Officers are tracing Leon Watson, from Netherton, in Dudley, over the alleged offence in March.
Anyone with information is asked to contact police by quoting crime reference number 20DY/57049K/20.
Dudley Police tweeted: "#WANTED | Have you seen Leon Watson?
"The 32-year-old from Netherton, Dudley is wanted on suspicion of domestic assault in March this year.
"If you know where he is, please contact us urgently via live chat or by calling 101."
Alternatively, people can call Crimestoppers anonymously on 0800555111.