Officers were alerted to a party taking place in Failsworth, and gave the occupant a fixed penalty notice.
It comes only two days after officers were called to Derker to reports of a party on Saturday night.
Under the current local lockdown rules, people from different households are banned from mixing in homes or gardens.
Across Greater Manchester between Friday and Sunday, Greater Manchester Police recorded 863 incidents related to Covid-19.
A post on the GMP Oldham Central Facebook page read: "Officers have this evening attended a report of a house party in Failsworth.
"This is a breach of the current COVID-19 restrictions.
"The occupant was issued with a fixed penalty notice."
