Sheehan is from the Irish word síocháin, meaning peace. As a surname, it may refer to:
Billy Sheehan (born 1953), American rock bassist
Bobby Sheehan (musician) (1968–1999), American rock bassist
Cindy Sheehan (born 1957), American anti-war politician and activist
D. D. Sheehan (1873–1948), Irish politician, journalist, and labour leader
Edward Sheehan (1930–2008), American journalist, diplomat and novelist
Fran Sheehan (born 1949), American rock bassist
Frank Sheehan (1933-2013), Canadian politician
Gary Sheehan (born 1964), Canadian-Swiss ice hockey coach
Harold Leeming Sheehan (1900–1988), British endocrinologist, for whom Sheehan's syndrome was named circa 1937
Helena Sheehan, American-born Irish academic and former nun
James J. Sheehan (born 1937), American historian
Jim Sheehan (1889–1967), Australian politician
John Sheehan (disambiguation), various including:
Michael J. Sheehan, World War II brigadier general
Mark Sheehan (born 1976), guitarist for The Script
Michael Jarboe Sheehan (born 1939), current archbishop of the Roman Catholic Archdiocese of Santa Fe
Michael A. Sheehan (born 1955), former Ambassador at Large for Counter-terrorism and Deputy Commissioner for Terrorism, New York Police Department
Neil Sheehan (born 1936), Pulitzer Prize-winning American journalist, husband of Susan Sheehan
Paul Sheehan (golfer) (born 1977), Australian professional golfer
Paul Sheehan (journalist) (born 1951), Australian journalist
Patrick Augustine Sheehan (1852–1913), Irish Catholic clergyman and author
P. A. Ó Síocháin (1905–1995), Irish journalist, lawyer, author, son of D. D. Sheehan
Patty Sheehan (born 1956), American golfer
Rhian Sheehan, New Zealand music composer and producer
Robert Sheehan (born 1988), Irish actor
Ryan Sheehan (born 1987), Engineer
Samantha Sheehan (born 1986), American artistic gymnast
Susan Sheehan (born 1937), Pulitzer Prize-winning American author, wife of Neil Sheehan
Tom Sheehan (1894–1982), American pitcher, scout and manager
Tom Sheehan (politician) (1891–1955), Australian politician
Thomas Sheehan (academic) (born 1941), American philosopher
Timothy P. Sheehan (1909–2000), American Congressman
William F. Sheehan, American politician
Winfield R. Sheehan (1883–1945), American film producer and executive, Fox Studios chief of production 1927–1935
