Officers stopped a Polish registered truck which came on a ferry from France and found the cigarettes within its load.
They have a retail value of €2.4 million, which is a potential loss to the exchequer of over 1.8 million.
A man in his 40s is being questioned as part of the investigation.
West Wicklow To Receive Major Fire Service Investment Under National Capital Programme
Wicklow to benefit from national investment with two new stations and upgraded equipment to boost emergency response times
Tánaiste Announces €40 Million Investment For Blessington Housing Development
The project will deliver 106 new social homes for families and individuals in West Wicklow.
Major Easter Rail Works Set to Disrupt Wicklow Commuters
Commuters travelling between Wicklow and Dublin are being warned of significant disruption to rail services over the Easter weekend.
Wicklow GAA Under Fire After ‘deeply disrespectful’ April Fools’ Post
'There is nothing funny about equality in sport. Nothing. This kind of messaging only reinforces the very attitudes we are working so hard to change.' Leane Lifely, Wicklow Camogie County Chairperson
Knockananna's Sarah Murray Takes First Dates Ireland By Storm
Wicklow woman Sarah wows the crowd as she prepares for her appearance on First Dates Ireland
8:00pm - 10:00pm
Love Songs on the Coast
Sunny intervals
High: 14°C | Low: 9°C
Sunny intervals
High: 14°C | Low: 9°C
Sunny intervals
High: 17°C | Low: 8°C
Medium-level cloud
High: 17°C | Low: 8°C
Medium-level cloud
High: 18°C | Low: 9°C