Lethbridge (formerly known as Lethbridge—Foothills) is a federal electoral district in Alberta, Canada, that has been represented in the House of Commons of Canada since 1917. It represents Lethbridge County.

This riding was originally created in 1914 from parts of Macleod riding.

In 1977, it was renamed "Lethbridge—Foothills".

In 1987, Lethbridge—Foothills was abolished and replaced by a new "Lethbridge" riding. The new riding was created from most of Lethbridge—Foothills, along with parts of Macleod and Medicine Hat ridings.

It has been represented by centre-right MPs without interruption since 1930. As in most other federal Alberta ridings outside of Calgary and Edmonton, it usually supports the major right-wing party of the day by landslide margins. Since 1945, a non-conservative party has only won 30 percent of the vote three times. Lethbridge itself is somewhat friendlier to centre-left candidates, at least at the provincial level. The Alberta New Democratic Party (NDP) won both seats in the provincial legislature from the city in the 2015 provincial election, and the city has occasionally elected provincial Liberals in the past as well. At the federal level, however, they are no match for the heavy conservative bent of the more rural areas.

As such, Lethbridge is represented by a Conservative federally, while the two provincial ridings are represented by the provincial NDP.

This riding lost territory to Medicine Hat—Cardston—Warner and Foothills during the 2012 electoral redistribution.

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