Krishna district is an administrative district in the Coastal Andhra region of the Indian state of Andhra Pradesh. Machilipatnam is the administrative headquarters and Vijayawada is the most populated city in the district. It has an area of 8,727 km2 (3,370 sq mi) and had a population of 45,29,009 as per 2011 census of India. It is bounded by West Godavari on the east, Bay of Bengal on the South, Guntur and Nalgonda districts in the west and a portion of it also borders with the state of Telangana.

Guntur district was separated from Krishna in 1904 to form Krishna district which was further divided in 1925, to Krishna and West Godavari districts.Krishna district is the most developed district in Andhra Pradesh.

Krishna district, with its district headquarters at Machilipatnam was formerly called Machlipatnam district. Later it was renamed as Krishna district, by adding certain Taluks of the abolished Guntur District in 1859 with Machilipatnam with its head. It was named after the Krishna River, the third longest river in India. The river flows through the state of Andhra Pradesh before it empties itself into Bay of Bengal, near Hamsaladevi village of Krishna district.

This history of this region dates back to the 2nd century BCE. The area was ruled by the Satavahanas (230 BC – AD 227); Pallavas (AD 340 – AD 500), Chalukyas (AD 615 – 1070 AD) and later by Cholas, Kakatiyas,Reddy dynasty and Gajapati kings of Odisha.

According to the 2011 census, the Krishna district has a population of 4,529,009,roughly equal to the nation of Croatia or the US state of Louisiana. This gives it a ranking of 34th in India (out of a total of 640) and 4th in its state.The district has a population density of 519 inhabitants per square kilometre (1,340/sq mi).Its population growth rate over the decade 2001–2011 was 8.15 percent.Krishna has a sex ratio of 997 females for every 1000 males, and a literacy rate of 74.37 percnet.

The Krishna District is in the eastern coast of the state bordering West Godavari district in the East, Bay of Bengal in the South, Guntur and Nalgonda district of Telangana in the West and Khammam district of Telangana in the Northern direction. The Krishna district occupies an area of 8,727 square kilometres (3,370 sq mi), comparatively equivalent to Corsica.The district is divided into upland and delta area.

The culture of Krishna district is mostly traditional in rural places and moderately modern in Vijayawada. It is also famous as the birthplace for Indian classical dance named kuchipudi and the culture with the dialect of Telugu spoken in Krishna is widely considered to be the standard form of Telugu.

Vijayawada, the major city in Krishna district has an important railway junction in the country. The largest bus terminus in the state is also located in Vijayawada, named as Pandit Nehru Bus station. Airport located at Gannavaram, 16 km north east of Vijayawada is one of the three domestic airport in the state. A new deep water port is under construction in Machilipatnam.Four national highways pass through the district namely National Highway 16 Formerly known as NH-5 from Chennai to Kolkata, NH 9 from Pune to Machilipatnam, NH 221 from Vijayawada to Jagdalpur, NH 214 Kathipudi to Pamarru, NH 214A Digamarru to Ongole.

Vijayawada is one of the main education centers in Andhra Pradesh. NTR University of Health Sciences is located in Vijayawada. Krishna University is located in Machilipatnam. International Institute of Information Technology is situated in Nuzvid. School of Planning and Architecture, South Indian Chapter is present in Vijayawada.District has numerous engineering colleges including Prasad V. Potluri Siddhartha Institute of Technology, Velagapudi Ramakrishna Siddhartha Engineering College, Lakireddy Bali Reddy Engineering College, Gudlavalleru Engineering College, DMS SVH College of Engineering, Govt Polytechnic Vijayawada (one of the oldest Polytechnic colleges in India), Andhra Loyola College, AANM & VVRSR (Gudlavalleru) Polytechnic College, Mary Stella college, Sidhartha Degree College are few of the many famous arts and science colleges in the district.

Kabbadi is the most popular sport, followed by cricket, volleyball, badminton, basketball and tennis.Indira Gandhi Municipal Stadium in Vijayawada hosts One Day Internationals Cricket matches of India. Only one international cricket match was played between India and West Indies on 24 November 2002 at Indira Gandhi stadium. It was won by West Indies. On 12 December 1997 Women’s Cricket Worldcup only a group match was played between England Women’s Cricket Team and Pakistan women’s cricket team, and it was won by England.