|• Official||Maithili, Hindi|
|Time zone||IST (UTC+5:30)|
|Lok Sabha constituency||Sitamarhi|
|Vidhan Sabha constituency||Parihar|
Sonbarsa is a village and a gram panchayat in Sonbarsa CD Block in the Sitamarhi district, state of Bihar, India. It is on the border with Nepal at Malangawa and there is a customs checkpoint at the border crossing.
National Highway 77 ends at Sonbarsa.