The County of Nairn was a general purpose county of Scotland, with the burgh of Nairn as the county town, until 1975, when, under the Local Government (Scotland) Act 1973, the county area became one of the eight districts of the two-tier Highland region. The county of Nairn survived for registration purposes and, at the same time, the Nairn lieutenancy was defined as having the boundaries of the new district.