| Office: | Senator |
| Term Start: | 23 February 1983 |
| Term End: | 17 February 1993 |
| Constituency: | Labour Panel |
| Office1: | Teachta Dála |
| Term Start1: | June 1981 |
| Term End1: | November 1982 |
| Constituency1: | Dublin South-West |
| Term Start2: | June 1977 |
| Term End2: | June 1981 |
| Constituency2: | Dublin County Mid |
| Term Start3: | December 1970 |
| Term End3: | June 1977 |
| Constituency3: | Dublin County South |
| Birth Date: | 18 January 1929 |
| Birth Place: | Dublin, Ireland |
| Death Place: | Dublin, Ireland |
| Party: | Fine Gael |
Lawrence McMahon (18 January 1929 – 16 February 2006) was an Irish Fine Gael politician who served both as a Teachta Dála (TD) and senator.[1]
McMahon was elected to Dáil Éireann at a by-election in 1970 in the Dublin County South constituency, following the resignation of Fianna Fáil TD Kevin Boland. He held the seat at the 1973 general election.[2] At the 1977 general election, he was returned for Dublin County Mid, and after a further revision of constituency boundaries, he was elected as TD for Dublin South-West at the general elections in 1981 and February 1982. He lost his seat at the November 1982 general election.[2]
From 1983 to 1992, he served as a member of Seanad Éireann, elected on the Labour Panel.[1]