gm. Piaseczno, precinct no. 20
| Precinct | Precinct no. 20 |
| Office | Burmistrz Piaseczna |
| Siedziba Obwodowej Komisji Wyborczej | Gimnazjum w Zalesiu Górnym, ul. Białej Brzozy 3 |
| Number of electors | 1,589 |
| Number of dispensed ballot cards | 552 |
| Number of valid ballot cards | 552 |
| Number of votes valid | 551 |
| Number of votes invalid | 1 |
| Protocol date | 26-11-2006 21:15 |
2nd ballot
| Number | Family name and given names | Age | Education | Address, party membership and endorsements | Number of votes | % of votes* |
|---|---|---|---|---|---|---|
| 1 | Bernacka-Rheims Maria Małgorzata | 56 | wyższe | Siedliska, submitted by Komitet Wyborczy Platforma Obywatelska RP, not a member of any political party | 271 | 49.18% |
| 2 | Zalewski Józef | 50 | wyższe | Jazgarzew, submitted by Komitet Wyborczy STOWARZYSZENIE SAMORZĄDOWE CENTRUM, member of Polskiego Stronnictwa Ludowego | 280 | 50.82% |