The Wolseley Motor Company was a British automobile manufacturer founded in 1901. After 1935 Wolseley was incorporated into larger companies but the Wolseley name remained as an upmarket marque until 1975.

The company officially became the Wolseley Motor Company in 1914. It also began operations in Montreal and Toronto, Canada as Wolseley Motors Limited. This became British and American Motors after World War I.

In 1918, Wolseley began a joint venture in Tokyo, Japan with Ishikawajiama Ship Building and Engineering. The first Japanese-built Wolseley car rolled off the line in 1922. After World War II, the Japan venture reorganized, renaming itself Isuzu Motors in 1949. Isuzu was part of General Motors for a time, but has recently returned to independence and a focus on the commercial truck market.

In 1919 Wolseley also took over the Ward End, Birmingham munitions factory from Vickers. Wolseley grew quickly selling upmarket cars, and even opened a lavish showroom, Wolseley House, in Piccadilly (next door to the the Ritz Hotel, now housing a restaurant called The Wolseley). Finances were strained, however, and the company faced receivership in October, 1926 with debts of £2 million.

In 1927 Wolseley was purchased personally by William Morris, 1st Viscount Nuffield for £730,000 using his own money
Today, the Wolseley marque is owned by Nanjing Automobile Group bought as part of the assets of the MG Rover Group. Note that the Wolseley Sheep Shearing Company continued trading, and continues today as Wolseley plc.