Pennsylvania State Senate seat · lines in effect since 2022
Pennsylvania Senate District 15
A district of about 263,000 people, 36% of adults with a bachelor's degree. It votes D+12.7 relative to the nation for president.
2024 election
Nov 5, 2024- Patty Kim (D) · won58.2%
- Dominic D. Difrancesco II (R)41.8%
Source: Pennsylvania Department of StateUpdated Oct 1, 2026, 6:19 AM ET
Where it sits among all 50 seats
Every Pennsylvania State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every election for this seat
15 races since 1968. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2022 | |||
| 2024 | Patty Kim (D) | Dominic D. Difrancesco II (R) | 16.4 |
| Lines first used in 2012 | |||
| 2020 | Giovanni M. Disanto (R) | George B. Scott (D) | 3.3 |
| 2016 | Giovanni M. Disanto (R) | Robert F. Teplitz (D) | 3.4 |
| 2012 | Robert F. Teplitz (D) | John McNally (R) | 3.1 |
| Lines first used in 2002 | |||
| 2008 | Jeffrey E. Piccola (R) | Judy Hirsh (D) | 3.8 |
| 2004 | Jeffrey E. Piccola (R) | Eric J. Epstein (D) | 22.1 |
| Lines first used in 1992 | |||
| 2000 | Jeffrey E. Piccola (R) | D. Ann Smilek (D) | 34.7 |
| 1996 | Jeffrey E. Piccola (R) | D. Ann Smilek (D) | 33.9 |
| 1992 | John J. Shumaker (R) | Dave Tamanimi (D) | 18.0 |
| Lines first used in 1982 | |||
| 1988 | John J. Shumaker (R) | D. Ann Smilek (D) | 37.4 |
| 1984 | John J. Shumaker (R) | A. Jane Perkins (D) | 12.6 |
| Lines first used in 1972 | |||
| 1980 | George Gekas (R) | Ron Buxton (D) | 33.3 |
| 1976 | George Gekas (R) | Larry Hochendoner (D) | 12.7 |
| 1972 | William B. Lentz (R) | Larry S. Shaffner (D) | 28.6 |
| Lines first used in 1962 | |||
| 1968 | William B. Lentz (R) | Frank B. Purcell (D) | 41.1 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 15
The state's districts in other chambers that share residents with this one, and the share of District 15's area in each.
- U.S. House
- PA-10 100%
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2016 | 2018 | 2020 | 2024 | |
|---|---|---|---|---|
| President | D+8.6 | No race | D+15.8 | D+16.1 |
| U.S. Senate | D+3.9 | D+16.5 | No race | D+16.8 |
| Governor | No race | D+24.7 | No race | No race |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 50 seats. Small marks are other seats in Pennsylvania. The black marker is District 15.
Higher than 63% of seats.
Lower than 78% of seats.
Higher than 78% of seats.
Higher than 86% of seats.
Higher than 82% of seats.
Denser than 57% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 947% college gradsD+17.0Not up in 2026District 26
41% college gradsD+20.5Held DDistrict 18
36% college gradsD+5.7Held DDistrict 10
49% college gradsD+11.3Held D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET