39 Kelurahan/Desa
| Kode | Nama | Kode Pos |
|---|---|---|
| 12.13.01.2001 | Adian Jior | 22912 |
| 12.13.01.2002 | Aek Banir | 22912 |
| 12.13.01.2003 | Aek Mata | 22912 |
| 12.13.01.1036 | Dalan Lidang | 22912 |
| 12.13.01.2004 | Darussalam | 22912 |
| 12.13.01.2005 | Gunung Barani | 22912 |
| 12.13.01.2006 | Gunung Manaon | 22912 |
| 12.13.01.2007 | Gunung Tua Jae | 22918 |
| 12.13.01.2008 | Gunung Tua Julu | 22918 |
| 12.13.01.2009 | Gunung Tua Tonga | 22918 |
| 12.13.01.2010 | Huta Lombang Lubis | 22912 |
| 12.13.01.2012 | Ipar Bondar | 22918 |
| 12.13.01.2013 | Kampung Padang | 22912 |
| 12.13.01.1014 | Kayu Jati | 22919 |
| 12.13.01.1011 | Kota Siantar | 22919 |
| 12.13.01.2015 | Lumban Pasir | 22912 |
| 12.13.01.2016 | Manyabar | 22912 |
| 12.13.01.2040 | Manyabar Jae | 22912 |
| 12.13.01.2017 | Pagaran Tonga | 22912 |
| 12.13.01.2038 | Panggorengan | 22912 |