January 4 - Sudanese President Omar al-Bashir goes to Juba to meet with Southern Sudanese President of the Government Salva Kiir Mayardit ahead of Southern Sudan's independence referendum.
January 7 - The United Nations says thousands of people are arriving in Southern Sudan from north Sudan ahead of the independence referendum on Sunday.
January 8 - Several people are killed in clashes with security forces in Southern Sudan, a day before the independence referendum.
January 10 - 36 people killed, including possibly 20 police, as Southern Sudan votes on referendum on independence.
January 12 - The Sudan People's Liberation Army/Movement estimates that turnout in the Southern Sudanese independence referendum has passed the 60% threshold for the result to be declared valid.
January 13 - The Southern Sudanese independence referendum, 2011 is confirmed by organisers to have had a turnout above the necessary threshold needed for it to be valid.
January 15 - The Southern Sudanese independence referendum, 2011 ends.
January 16 - Southern Sudanese leader Salva Kiir calls on the people of South Sudan to forgive the north for killings during the civil war.
January 21 - Almost 99% of South Sudanese voted for independence from the north in a referendum according to official figures.
January 26 - The preliminary results of the referendum on an independence for Southern Sudan will be announced in the next few days, with final results as early as February 7; most of the count in the south already completed shows 99% voted for independence.
January 30 - Southern Sudan chooses to become independent of Sudan with over 99% voting yes in the referendum.
January 31 - Southern Sudan announces it plans to officially declare independence from Sudan on July 9, 2011.
February
February 2 - The Sudanese government, in its first official reaction after preliminary results were announced indicating a landslide vote in favor of Southern Sudan's independence, agrees to accept the results; Vice-President Ali Osman Taha says the government intends "to pursue a policy of good neighbourly relations with the south".
February 5 - At least 20 people are killed in a shootout among the military in Malakal.
March
April
May
June
July
July 9 - South Sudan became an independent republic.
July - the Sudanese pound is replaced by the South Sudanese pound, which is released in the form of banknotes for £1 SSP, £5 SSP, £10 SSP, £25 SSP, £50 SSP, and £100 SSP.
