Salla Union  Salla Union () is a union of Kalihati Upazila, Tangail District, Bangladesh. It is situated 21 km north of Tangail, The District Headquarter. According to Population Census 2011 performed by Bangladesh Bureau of Statistics, The total population of Salla union is 19916. There are 4798 households in total. The literacy rate of Salla Union is 38.2% (Male-40.9%, Female-35.6%).