The residual regency thus covered 7,486.21 km2 and within its reduced area had a population of 551,202 at the 2010 Census[2] and 612,900 at the 2020 Census, the latter comprising 312,953 males and 299,947 females;[3] the official estimate as at mid 2023 was 640,224 - comprising 326,519 males and 313,705 females,[1] prior to the intended separation (as stated in late 2022) of another six districts to form the new Rambang Lubai Lematang Regency,[4] which comprised 70 villages (desa) with an area of 2,311.27 km2 and 172,020 people as at mid 2023.

Mining and agricultural activities are abundant in the regency and it is also a producer of oil.

Bumi Serasan Sekundang is located in the heart of South Sumatra Province.

The resulting twenty-two districts (including the six intended to form the new Rambang Lubai Lematang Regency) are listed below with their areas and their populations at the 2010 Census[2] and the 2020 Census,[3] together with the official estimates as at mid 2023.

The topography of the regency comprises a southern group of five districts with an altitude of over 100 metres above sea level in the Bukit Barisan mountain chain, a west-central group of five districts, an east-central group of six districts (those intended to be split off), and finally a northern group of six districts of mainly swamp area facing directly with the Musi River basin, which (since the creation of the Penukal Abab Lematang Ilir Regency in 2013) are physically separated from the rest of the Muara Enim Regency by the city of Prabumulih.