Custody centres across Devon and Cornwall are full after the New Year celebrations.
Devon and Cornwall Police said they had made more than 160 arrests overnight - the majority of which involved alcohol-related and public order offences.
Insp Andy Oliver said the level of arrests for the time of year was "not unexpected".
"It is a busy time of the year - if not the busiest - for the emergency services," he told BBC News.
"But on the whole people celebrated well and there was no significant disorder."