Arjuna Union () is a union of Bhuapur Upazila, Tangail District, Bangladesh. It is situated 36 km north of Tangail.
According to Population Census 2011 performed by Bangladesh Bureau of Statistics, The total population of Arjuna union is 26793. There are 6810 households in total.
The literacy rate of Arjuna Union is 41.1% (Male-42.5%, Female-39.8%).