Majha
The partition split the Punjab Province (British India) into the two states of West Punjab (Punjab, Pakistan) and East Punjab. However, the historic Majha region is arguably still the same as before since the partition does not change the previous history of Punjab, therefore does not change the geography of the Majha region of the historic Punjab region.
West Punjab
West Punjab was a province of Pakistan from 1947 to 1955. The province covered an area of 205,344 km2 (79,284 sq mi), including much of the current Punjab province and the Islamabad Capital Territory, but excluding the former princely state of Bahawalpur. The capital was the city of Lahore and the province was composed of four divisions (Lahore, Sargodha, Multan and Rawalpindi). The province was bordered by the Indian states of East Punjab and Jammu and Kashmir to the east, the princely state of Bahawalpur to the south, the provinces of Balochistan and Sind to the southwest, Khyber-Pakhtunkhwa to the northwest, and Azad Kashmir to the northeast.