|• Total||158.41 km2 (61.16 sq mi)|
|• Density||190/km2 (490/sq mi)|
|Racial makeup (2011)|
|• Black African||54.6%|
|First languages (2011)|
|Time zone||UTC+2 (SAST)|
|Postal code (street)|
Town 67 km (42 mi) north of Griquatown and 58 km (36 mi) west-south-west of Daniëlskuil. Originally a station of the London Missionary Society called Sibiling, it became a Griqua village with the name Blinkklip. It was proclaimed a town on 6 June 1892 and named after the Reverend Dirk Postma (1818-1890), founder of the Reformed Church.
The town achieved municipal status in 1936.
The South African Army's Combat Training Centre is located nearby, at Lohatla