Chak 21 S.B. is a village, four kilometers away in north from Kot Momin, in Sargodha District. This village came into existence on the South Branch Canal created in 1901 by the British.
Different families from District Jehlum Tehsil: Pind Dadan Khan moved there and got 50-acre (200,000 m2) per family agriculture land based on the mare they own.
Major families in the village are:
Most of the families are associated with agriculture. Area is good for the production of Kinno (Mondarian).
Literacy rate is around 50%. There is one elementary school for boys and primary school for girls.