The Regional Directory of Nepali Websites

CBS.gov.np - Population Tahanu
Offers population statistics for this district. (Site might be slow for visitors away from Nepal, please give this page some time to load)
http://www.cbs.gov.np/Population/National%20Report%202001/vdcpop/tanahu.htm

Pddp.org.np - Tanahu
About the district along with map from this organization.
http://www.pddp.org.np/project_dist/tanahu.htm