The cocaine was concealed in Milka multipack chocolate boxes.
Revenue officers have made €300,000 drugs bust in Westmeath.
Over 4 kilograms of cocaine were discovered during routine examinations of parcels in Athlone on Tuesday.
The illegal drugs have an estimated value of €305,200 and were concealed in Milka multipack chocolate boxes that originated in the Netherlands and were destined for Dublin.
Investigations are ongoing.
The seizure is part of Revenue's ongoing operations targeting the importation of illegal drugs.
If businesses or members of the public have any information regarding smuggling, they can contact Revenue in confidence on Confidential Phone Number 1800 295 295.