The number of new cars sold in Mayo in January increased by 30 per cent compared to January 2014.
The sales figures were released by the Society of the Irish Motor Industry.
The SIMI and DoneDeal Motor Industry Review for 2014 published last week also showed car sales in Mayo last year increased by 33.9 per cent overall compared with 2013.
Last year, 1,828 new cars were sold in the county compared to 1,365 in 2013.
Last month alone, there were 626 cars sold compared with 481 in January 2014.