| Piekarska Katarzyna Maria | ||||
| Information about candidate to the Sejm | ||||
| committee | Profession | Resident of | Endorsement | Constituency number |
| Komitet Wyborczy Sojusz Lewicy Demokratycznej | radca prawny | Warszawa | member of Sojusz Lewicy Demokratycznej | 20 |
| Number of votes for candidate | Percentage of valid votes in the constituency | Number of votes for the list | Percentage of votes cast for the candidate in relation to the votes on the list | Mandate |
| 13 944 | 3,10% | 23 739 | 58,74% | No |
| Results of voting in Senate Constituency No. 20 divided into precincts | ||||||
| No. | Address | Number of votes | Percentage of valid votes | Number of votes for the list | Percentage of votes in the list | |
| pow. grodziski | 1 207 | 3,30% | 1 923 | 62,77% | ||
| pow. legionowski | 1 993 | 4,17% | 2 990 | 66,66% | ||
| pow. nowodworski | 860 | 3,06% | 2 779 | 30,95% | ||
| pow. otwocki | 1 320 | 2,43% | 2 641 | 49,98% | ||
| pow. piaseczyński | 2 571 | 3,56% | 3 686 | 69,75% | ||
| pow. pruszkowski | 2 275 | 3,09% | 3 585 | 63,46% | ||
| pow. warszawski zachodni | 1 361 | 2,86% | 2 181 | 62,40% | ||
| pow. wołomiński | 2 357 | 2,63% | 3 954 | 59,61% | ||
