Thomas Kerr Lynch (1818–1891) was an Irish explorer.
A younger brother of Henry Blosse Lynch (born 1807), Thomas was born at Partry House, Ballinrobe (then in County Galway but now in County Mayo) to Major Henry Blosse Lynch (1778–1823).
The major had served in the 73rd Regiment and had an estate of fifteen hundred acres north of Ballinrobe.
In 1837 he joined his brother Henry, who commanded an expedition up the Tigris river to Baghdad, a previously unaccomplished voyage.
Thomas Kerr Lynch died in London in 1891.