| gm. Konstancin-Jeziorna, Precinct no. 12 |
| Vote on 05-12-2010 | |
| Office | Burmistrz Gminy Konstancin-Jeziorna |
| Precinct | Precinct no. 12 |
| Electoral Commission Regional Headquarters | Zespół Szkół Nr 4 w Słomczynie, ul. Wilanowska 218,05-507 Słomczyn |
| Number of electors | 1 657 |
| Number of dispensed ballot cards | 469 |
| Number of valid ballot cards | 469 |
| Number of votes valid | 468 |
| Number of votes invalid | 1 |
| Number of dispensed ballot cards for plenipotentiaries | 2 |
| Protocol date | 05-12-2010 22:21 |
| No. | Family name and given names | Age | Education | Address, party membership and endorsements | Number of votes | Votes % | |
| 1 | Jańczuk Kazimierz | 64 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY PLATFORMA OBYWATELSKA RP, not a member of any political party | 289 | 61,75% | |
| 6 | Skowroński Marek Stanisław | 38 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY WYBORCÓW PRAWO RODZINA SPRAWIEDLIWOŚĆ, not a member of any political party | 179 | 38,25% | |
| Vote on 21-11-2010 | |
| Office | Burmistrz Gminy Konstancin-Jeziorna |
| Precinct | Precinct no. 12 |
| Electoral Commission Regional Headquarters | Zespół Szkół Nr 4 w Słomczynie, ul. Wilanowska 218,05-507 Słomczyn |
| Number of electors | 1 655 |
| Number of dispensed ballot cards | 817 |
| Number of valid ballot cards | 817 |
| Number of votes valid | 791 |
| Number of votes invalid | 26 |
| Number of dispensed ballot cards for plenipotentiaries | 2 |
| Protocol date | 22-11-2010 03:49 |
| No. | Family name and given names | Age | Education | Address, party membership and endorsements | Number of votes | Votes % | |
| 1 | Jańczuk Kazimierz | 64 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY PLATFORMA OBYWATELSKA RP, not a member of any political party | 202 | 25,54% | |
| 2 | Klucz Jerzy Krzysztof | 51 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY SOJUSZ LEWICY DEMOKRATYCZNEJ, endorsed by Sojusz Lewicy Demokratycznej, member of Sojuszu Lewicy Demokratycznej | 20 | 2,53% | |
| 3 | Machałek Ryszard | 55 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY POROZUMIENIE OBYWATELI KONSTANCINA- JEZIORNY, endorsed by Porozumienie Obywateli K-J, not a member of any political party | 70 | 8,85% | |
| 4 | Mioduszewska Maria | 60 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY WYBORCÓW NASZA GMINA - NASZ POWIAT, not a member of any political party | 123 | 15,55% | |
| 5 | Rutkowski Roman Paweł | 42 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY WYBORCÓW KONSTANCIN-JEZIORNA XXI WIEKU, not a member of any political party | 122 | 15,42% | |
| 6 | Skowroński Marek Stanisław | 38 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY WYBORCÓW PRAWO RODZINA SPRAWIEDLIWOŚĆ, not a member of any political party | 185 | 23,39% | |
| 7 | Tomaszewski Jacek Tomasz | 58 | wyższe | Konstancin-Jeziorna, submitted by KOMITET WYBORCZY STOWARZYSZENIA NASZE MIASTO KONSTANCIN, not a member of any political party | 69 | 8,72% | |
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