Hugh MacLennan (1907–90), Canadian author and academic

Scotty McLennan (1948–), American minister of religion, academic, lawyer and author

McLennan County, Texas, United States

Jamie McLennan (1971–), Canadian ice hockey player

Clan MacLennan, a Scottish clan

Grant McLennan (1958–2006), Australian singer-songwriter with the band The Go-Betweens

McLennan, Alberta, Canada

Robert Maclennan (1936–), Scottish politician

John Ferguson McLennan (1827–81), Scottish ethnologist

Ruari MacLennan (1988–), Scottish footballer

Michael MacLennan (1968–), Canadian playwright

Angus McLennan (1844–1908), Canadian politician

Margo McLennan (1938–2004), English television actor

John McLennan (1821–93), Canadian politician and businessman

Hugh Dan MacLennan, Scottish broadcaster and writer

John Cunningham McLennan (1867–1935), Canadian physicist

Ross McLennan, Australian pop singer

Maclennan, South Island, New Zealand

Scott MacLennan (1987–), Scottish cricketer