Banyumas Regency's population was 1.78 million in 2020.

The 2020 Population Census recorded Banyumas Regency's population at 1.78 million. Of this, 894,700 were male and 882,220 were female.

Spatially, Cilongok is the most populous sub-district in Banyumas Regency, with 124,680 inhabitants (7.02%) of the total population. Purwojati, on the other hand, is the least populous sub-district, with only 36,980 inhabitants (2.08%).

By age group, 1.23 million (68.95%) of Banyumas Regency's population is of productive age (15-64 years). The remaining 551,670 (31.05%) are of non-productive age. This comprises 398,000 (22.4%) in the non-productive age group (0-14 years) and 153,670 (8.64%) in the unproductive age group (65 years and older).

Banyumas Regency covers an area of 1,327.59 square kilometers (4.04%) of Central Java Province's total area. This regency, with its capital in Purwokerto, has a population density of 1,338 people per square kilometer. Administratively, Banyumas Regency is divided into 27 sub-districts with 331 villages/urban villages.

Banyumas Regency had a regional original revenue (PAD) of Rp 567.42 billion in 2020. This comprised Rp 208.01 billion from regional taxes, Rp 23.78 billion from regional levies, Rp 15.8 billion from regional government-owned companies and the management of separated regional assets, and Rp 319.82 billion from other legitimate PAD sources.

Currently, there is a proposal to divide Banyumas Regency into three regencies. First, Banyumas Regency with its capital in Banyumas Sub-district. Second, West Banyumas Regency with its capital in Wangon Sub-district. Third, Purwokerto Regency with its capital in Purwokerto.