Loewen is a Canadian millwork manufacturer of wood window and door systems for residential and light commercial use.

Loewen targets the high-end market, and, as of late 2019, has a network of several hundred dealers across North America, employing over 500 people.

From the 1930s through the 1940s the company shifted to manufacturing pre-built windows and doors to supply the post-war boom in housing construction.

In the 1980s Loewen combined the company's old-world craftsmanship and work ethic with the most advanced production technology available at the time.

[citation needed] Through the 90's, Loewen expanded its distribution into the United States and became one of the leading suppliers[dubious – discuss] of high-end, custom wood windows and doors.