Hanover, known in German as Hannover, serves as the capital and largest city of the German state of Lower Saxony. Situated at the confluence of the River Leine and its tributary the Ihme within the south of the North German Plain, it functions as a major administrative hub. The city lies northwest of the Harz mountains and acts as a critical crossing point for railway lines and motorways, connecting European main lines in both east-west and north-south directions across the region.

Founded in medieval times on the east bank of the Leine River, Hanover received town privileges in 1241 due to its position at a natural crossroads. It served as the capital of various political entities including the Principality of Calenberg, the Electorate of Hanover, and the Kingdom of Hanover before becoming the state capital in 1946. The city endured significant destruction during World War II, leaving few historical landmarks, though it retains residential neighborhoods with late-19th-century housing stock featuring historicist and Art Nouveau decorations.

The urban landscape is defined by its flat terrain and large green areas, including forests and the man-made Maschsee lake. The Old City area contains approximately forty original houses collected from throughout the city, surrounded by 1950s and 1960s buildings. Notable sites include the Hanover Fairground, which is the largest in the world due to extensions for Expo 2000, and the Sprengel Museum, honoring artist Niki de Saint-Phalle through her public works and an honorary citizenship granted by the city government.

Hanover hosts major annual commercial trade fairs such as the Hanover Fair and the biannual IAA Commercial Vehicles show, alongside the world's largest marksmen's festival, Schützenfest. The city was named a UNESCO City of Music in 2014 and hosted the 2006 Association Football World Cup. Its cultural appeal is bolstered by excellent public services resulting from reconstruction for Expo 2000 and renovated shopping areas under the central station, drawing visitors interested in logistics, mobility, and creative arts.

The city has a population of 522,131 as of 2024, making it the thirteenth-largest in Germany. Its economy is supported by major institutes of higher education like the Hanover Medical School and Leibniz University, as well as the International Neuroscience Institute. Transport access is facilitated by Hanover Airport in Langenhagen, Germany's ninth-busiest airport, and its role as a gateway to the Rhine, Ruhr, and Saar river valleys for overland traffic.