Brouillard is a French surname. Notable people with the surname include:
- André Léon Brouillard (1900–1985), French writer, spy and resistance member
- Jacob Brouillard, American politician
- Joseph Ovide Brouillard (1859–1940), Canadian politician
- Lou Brouillard (1911–1984), Canadian boxer
- Louis Brouillard (1921–2018), American Catholic priest