1942
(April 1) On April 1, 1942, the Reich Governor of Anhalt and Brunswick, Jordan, decrees the founding of the town of Salzgitter from seven villages in the former Prussian district of Goslar and 21 in the Brunswick district of Wolfenbüttel. It is given the name Watenstedt-Salzgitter.

1945
(April 10) American troops occupy the town and the smelter. There is fighting in parts.

1949
(12.8.) The Inter-Allied Reparations Commission in Brussels releases nine blast furnaces, the rolling mill, the steelworks, the foundry and numerous ancillary facilities for dismantling.

1950
The inter-allied directive for the demilitarization of the Salzgitter area orders the demolition of 90% of all the steelworks' buildings, including their foundations. The workers at the plant rise up against this order. Their spontaneous action marks the beginning of the end of dismantling in Germany.

1960
Blaupunkt-Werke settles in Lebenstedt.

1961
The "Central Registration Office of the State Justice Administrations" begins its work in Salzgitter. The task of the registration office is to investigate reports of the use of violence at the borders and in the GDR prison system and to collect evidence.

1961 - 1962
The Salzgittersee near Lebenstedt is created. Remarkable remains of mammoth, bison, aurochs, rhinoceros ... are found in its gravel bottom.

1963
The town hall, built at a cost of DM 15 million, is inaugurated on October 19. The foundation stone was laid on 26.10.1959.

1966
The Salzgitter-Bad municipal hospital is opened on April 7. The Thiede indoor swimming pool is opened on November 12.

1968
The city receives its second indoor swimming pool in Lebenstedt.

1969
Construction of the Volkswagen plant in Beddingen.

1972
The thermal brine wave pool at Greifpark in Salzgitter-Bad is opened to the public. The old bathhouse built in 1911 is demolished. MAN takes over the facilities from the long-established Büssing company in Watenstedt.

1974
As part of the territorial reform, the formerly independent municipalities of Sauingen and Üfingen (Wolfenbüttel district) are assigned to the city of Salzgitter. From March 1, the city of Salzgitter no longer has 29, but 31 districts.

1975
Salzgitter and the British twin town of Swindon become twin towns. The Salzgittersee is completed in its planned size of 75 hectares. The first dredging work began in October 1960.

1978
The ice rink is opened in January.

1980
Salzgitter and the French town of Créteil become twin towns.

1981
Opening of the Aldi store in Salzgitter

1982
Completion of the large Amselstieg sports hall and the main fire station in Lebenstedt. Ore mining in the city area ends on June 30 with the closure of the Haverlahwiese shaft in Gebhardshagen.

1983
The traditional island in Salzgitter-Bad is completed. With Kniestedter Gutshaus, Tilly-Haus, Garßenhof, Pressehaus and Gildehaus, it gives the old town a special character. The new district court building in Lebenstedt is occupied.

1985
State recognition for Salzgitter-Bad as a town with a brine spa. The Robert-Bosch-Elektronik GmbH plant starts production.

1986
First step in the redevelopment of Lebenstedt city center with the handover of the Stadtpassage.

1987
Salzgitter and the Russian town of Staryj Oskol become twin towns. The police move into their new office building in Lebenstedt.

1988
Salzgitter and Gotha in Thuringia become twin towns. Completion of the new Chemnitzer Strasse as a further step in the redevelopment of Lebenstedt city center.

1989
Development of the Schützenplatz in Salzgitter-Bad; handover of the retirement and nursing home on Salzgittersee. Salzgitter becomes the headquarters of the Federal Office for Radiation Protection. Salzgitter AG is sold to Preussag AG for 2.5 billion marks. The proceeds are used to establish the German Federal Environmental Foundation (DBU) based in Osnabrück.

1990
The new municipal library building in Lebenstedt is opened in February.

1991
Handover of the modernized Thermalsolbad. Expansion of the Aldi warehouse in Salzgitter

1992
Salzgitter celebrates its 50th anniversary with a ceremony and an international week of events, among other things, and the "Central Registration Office of the State Justice Administrations" is dissolved. In the three decades of its existence, the authority records around 42,000 acts of violence in the former GDR. After unification, the files are handed over to the public prosecutor's offices responsible for the respective locations.

1993
The American company Cargill builds an oil mill with a malting plant at Bedding Harbour and produces for the food and animal feed industry.

1994
The renovation of the Kniestedter manor house in Salzgitter-Bad is completed. Among other things, it houses a branch of the Volkshochschule. Salzgitter becomes the location for the transport and traffic department of the Braunschweig/Wolfenbüttel University of Applied Sciences.

1995
The city receives a landmark in the form of Professor Jürgen Weber's "Monument to City History" in the center of Lebenstedt. Completion of the inner city redevelopment and laying of the foundation stone for the new Federal Office for Radiation Protection building in Lebenstedt.

1996
A Biedermeier-style wedding room is set up in the Kniestedter Gutshaus in Salzgitter-Bad. Renovation of the keep of Heinrich des Löwen castle in Lichtenberg. The newly founded city-owned ASG (Abwasserentsorgung Salzgitter GmbH) takes over the task of urban drainage from the civil engineering department. The Braunschweig/Wolfenbüttel University of Applied Sciences expands its range of courses in Calbecht to include tourism business administration.

1997
The Braunschweig/Wolfenbüttel University of Applied Sciences expands its range of courses in Calbecht to include transportation, traffic and ecology. The new building of the Federal Office for Radiation Protection in Lebenstedt is ready for occupancy. The city's own municipal cleaning company is formed from the city's cleaning and waste management department.

1998
The Citytor (former Hertie building) is opened. In addition to many stores, it also houses an Omniplex cinema with seven screens. The BürgerCenter is set up in the atrium of the town hall to optimize the administration's customer service for citizens. The Braunschweig/Wolfenbüttel University of Applied Sciences adds sports management to its range of courses in Calbecht. Spin-off of Preussag Stahl AG and change to the new name Salzgitter AG.

1999
The Braunschweig/Wolfenbüttel University of Applied Sciences inaugurates its new building in Calbecht.

2000
The Swedish furniture store Ikea builds a delivery center in the Watenstedt Industrial Park. Large town twinning reception for all twin towns as part of the Hanover World Exhibition Expo 2000 in Salzgitter. The Braunschweig/Wolfenbüttel University of Applied Sciences adds media design to its range of courses in Calbecht.

2001
Introduction of a single municipal administration: the directly elected Lord Mayor Helmut Knebel (SPD) takes over the duties of the head of administration, which until then had been carried out by the Chief Executive. The municipal hospital is privatized and now bears the name Klinikum Salzgitter GmbH. The city is the sole shareholder.

2002
Salzgitter celebrates its 60th birthday with a big week of festivities. The state government declares Salzgitter a regional center alongside Braunschweig and Wolfsburg. The largest wind farm in the region is opened on the A 39. Opening of the Technology and Start-up Center in Salzgitter-Bad.

2003
Opening of the Calbecht Children's University at the Braunschweig/Wolfenbüttel University of Applied Sciences. City of Salzgitter transfers municipal business development and tourism tasks to Wirtschafts- und Innovationsförderung Salzgitter GmbH (WIS).

2004
Thiede indoor swimming pool and Gebhardshagen forest swimming pool are transferred to private ownership. New Medienzentrum opens in the old village in Lebenstedt. Private operator opens water ski facility on Salzgittersee. City sells Klinikum Salzgitter GmbH to Rhön Klinikum AG.

2005
Numerous events in Salzgitter are held to mark the 60th anniversary of the end of the Second World War. Three of the four 135-metre-high chimneys of the sintering plant in Hallendorf are demolished for economic reasons. Donations enable the opening of an inpatient hospice at the Salzgitter-Bad clinic.

2006
The Apollo-Center shopping center in Lebenstedt is demolished and a new shopping center (City-Caree) is to be built in its place. Frank Klingebiel (CDU) is elected as the new mayor of the city of Salzgitter for a term of eight years.

2007
The council decides to have a shopping center "Altstadt-Carrée" built on the former Karstadt site in Salzgitter-Bad. Mayor Frank Klingebiel gives the starting signal for the development of Salzgitter as a child and family-friendly city with a kick-off event in the town hall.

2008
In January, the Salzgitter water and energy supply company (WEVG) and the electricity supplier E.ON Avacon merge. On June 12, the "City-Carrée" shopping center with a total area of around 25,000 square meters and almost 600 parking spaces is opened in Salzgitter-Lebenstedt.

2009
Inauguration of a graduation pavilion on October 23. On November 9, a section of the former Berlin Wall is unveiled to mark the opening of the Central Registration Office of the State Justice Administrations memorial. Construction of a new logistics center for MAN Nutzfahrzeuge begins on November 30.

2010
In the summer, E.ON Avacon began construction of its new technical center. On August 1, a five-form entry integrated comprehensive school (IGS) with a grammar school senior class was opened in the Amselstieg school center. The new clinic building was completed in the fall, with official occupancy on November 6.

2011
The building on Platz der Städtepartnerschaft in Salzgitter-Lebenstedt is demolished in March 2011 to make the entrance area to the city center more open. Also in March, MAN opens its 60 million euro logistics center. The negotiated non-profit Salzgitter Foundation is launched.