The district has an area of 10,252 km², and a population of 2,021,783 (2001 census), a 23% increase from its 1991 population of 1,646,198. Sagar is bounded by Lalitpur District of Uttar Pradesh state to the north, and the Madhya Pradesh districts of Chhatarpur to the northeast, Damoh to the east, Narsinghpur to the south, Raisen to the southwest, Vidisha to the west, and Ashoknagar to the northwest. Sagar district is dominated by Sonis, Jains and Yadavs.
As of 2011 it is the third most populous district of Madhya Pradesh (out of 50), after Indore and Jabalpur.
Sagar District is an extensive, elevated and in parts tolerably level plain, broken in places by low hills of the Vindhyan sandstone. It is traversed by numerous streams, chief of which are the Sunar, Beas, Dhasan and Bina rivers, all flowing in a northerly direction towards the valley of the Ganges. In the southern and central parts the soil is black, formed by decaying trap; to the north and east it is a reddish-brown alluvium. Iron ore of excellent quality is found and worked at Hirapur, a small village in the extreme north-east. The district contains several densely wooded tracts, the largest of which is the Ramna teak forest preserve in the north.
Neminagar Jain Tirth is in Banda tehsil located 30 km from Sagar on National Highway NH-86. It was built in the name of Aacharya Shri 108[clarification needed] Nemisagar ji maharaj by the blessings of his disciple aacharya 108 shri dayasagar ji maharaj. This temple has one choubisi (24 tirthankars god on 24 different altar) one levitated trikal choubisi (Lords of time passes, the time now and time to be) and a navagraha mandir (Lords of nine planets).
There is a hill called OSHO Hill Acharya Rajnish was done his Amrit Sadhna in This hill.A former Dr H S Gour University started from Makronia's SAF Campus so many Historic event is connected through makronia, This region is developing as the suburban region near Sagar city. It is just 5 km away from city. It has its separate railway station. It has the biggest hotel of Sagar the 3 star Paradise hotel, many CBSE and MP board schools as well as government engineering college. many army bases are located in makronia. Also makronia grampanchayat is biggest grampanchayat of Madhya Pradesh(Sourabh).
Dr. Harisingh Gour – Founder of Sagar University also called Dr. Harisingh Gaur University, famous lawyer, jurist, educationists, social reformer, poet, and novelist and member of constitutional assembly.