Up to 1,000 EDL members travelled to Dudley to protest against plans for a mosque, amid a heavy police presence.
The protesters marched from the town centre to the council house and held speeches objecting to the so-called “super mosque”.
Many shops shut for the afternoon and some were boarded up as a precaution, although the Churchill shopping centre stayed open.
A counter-protest was staged by members of Unite Against Fascism (UAF).
Thirty arrests were made mainly to prevent a breach of the peace, police said.