| State: | Pennsylvania |
| District: | 165 |
| Chamber: | House of Representatives |
| Representative: | Jennifer O'Mara |
| Party: | Democratic |
| Residence: | Springfield Township, Delaware County |
| Population: | 62,800 |
| Population Year: | 2021 |
Pennsylvania House of Representatives District 165 includes part of Delaware County. It is currently represented by Democrat Jennifer O'Mara.
The district includes the following areas:[1]
| Representative | Party | Years | District home | Note | |
|---|---|---|---|---|---|
| Before 1969, seats were apportioned by county. | |||||
| 1969 - 1974 | |||||
| 1975 - 1978 | |||||
| Republican | 1981 - 1988 | ||||
| Republican | 1989 - 2016 | ||||
| Republican | 2017 - 2018 | ||||
| Democrat | 2019 - present | Incumbent |