La Cité-Limoilou (French pronunciation: [la site limwalu]) is the central borough of Quebec City, the oldest (in terms of architecture), and the most populous, comprising 19.73% of the city's total population.

It is in turn centred on the old walled city, Old Quebec, and also includes nearby Parliament Hill, the Old Port, and the Petit Champlain shopping district.

In terms of architecture, Limoilou is second only to La Cité as Quebec City's oldest neighbourhood.

[4] It is a variant of the word Limoëlou, the name of 16th century French explorer Jacques Cartier's manor in Saint-Malo, Brittany, France.

Originally a separate municipality, it was incorporated into Quebec City in 1909 with which came larger, more urban projects.