Alexander Roderick McLeod (c. 1782 – 11 June 1840) was a fur trader and explorer in British North America who began his career with the North West Company in 1802. McLeod became a trader and brigade leader with the Hudson's Bay Company (HBC), led by Sir George Simpson, after they joined with the NWC in 1821. He was highly active in solidifying the HBC role in the Pacific Northwest and was instrumental in George Back's Arctic expedition, as well as in establishing the Siskiyou Trail between Fort Vancouver and the Sacramento Valley of California.