Tim, Timmy, or Timothy Ryan may refer to:

Political figures

• Tim Ryan (Florida politician) (born 1956), American Democratic Party legislator and county commissioner
• Tim Ryan (Ohio politician) (born 1973), American Democratic Party legislator and 2020 presidential candidate
• Tim Ryan, alternative pseudonym of American Communist Party leader Eugene Dennis (1905–1961)

Sportspeople

• Timmy Ryan (1910–1995), Irish hurler for Limerick
• Tim Ryan (hurler) (1923–1996), Irish hurler for Tipperary
• Tim Ryan (sportscaster) (born 1939), Canadian-born American sportscaster
• Tim Ryan (American football, born 1967) (born 1967), American defensive tackle and broadcaster
• Tim Ryan (American football, born 1968) (born 1968), American offensive lineman
• Tim Ryan (footballer) (born 1974), English footballer
• Tim Ryan (rugby union) (born 1984), Irish rugby player

Others

• Tim Ryan (actor) (1889–1956), American performer and scenarist
• Timothy Ryan (newspaper publisher), American media executive (The Baltimore Sun)
• Tim Ryan (1949–2016), Canadian musician, co-founder of band Jackson Hawke
• Tim Ryan (engineer), American synthesizer engineer since 1970s, founder of M-Audio
• L. Timothy Ryan (born 1958), American chef and president of the Culinary Institute of America
• Tim Ryan (country musician) (born 1964), American country music singer-songwriter
• Tim Ryan (recovery advocate) (born 1968), American activist, drug abuse interventionist, author, and speaker
• Tim Ryan (businessman), chairman of PwC.

Fictional characters

• Tim Ryan (Blue Heelers), portrayed by Grant Piro in 1998–99 on Australian TV series Blue Heelers