| Thomas Percival Lancaster | |
| Office1: | Ontario MPP |
| Term Start1: | 1929 |
| Term End1: | 1934 |
| Predecessor1: | New riding |
| Successor1: | Alexander Leslie Elliott |
| Constituency1: | Peterborough |
| Term Start2: | 1929 |
| Term End2: | 1934 |
| Predecessor2: | William Alfred Anderson |
| Successor2: | Riding abolished |
| Constituency2: | Peterborough County |
| Party: | Conservative |
| Birth Date: | 18 July 1877 |
| Death Place: | Campbellford, Ontario |
| Occupation: | Newspaper publisher |
Thomas Percival Lancaster (July 18, 1877 - October 10, 1968) was a newspaper publisher and political figure in Ontario. He represented the ridings of Peterborough County and Peterborough in the Legislative Assembly of Ontario from 1929 to 1937 as a Conservative member.
Lancaster purchased the Havelock Standard in 1897 and operated it until 1939.[1] He died in Campbellford at the age of 91.[2]