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.
Punjab
Until the Partition of Punjab in 1947, the British Punjab Province encompassed the present-day Indian states and union territories of Punjab, Haryana, Himachal Pradesh, Chandigarh, and Delhi; and the Pakistani provinces of Punjab and Islamabad Capital Territory. It bordered the Balochistan and Pashtunistan regions to the west, Kashmir to the north, the Hindi Belt to the east, and Rajasthan and Sindh to the south.