| m. Siemiatycze, Precinct no. 3 |
| Vote on 05-12-2010 | |
| Office | Burmistrz Miasta Siemiatycze |
| Precinct | Precinct no. 3 |
| Electoral Commission Regional Headquarters | Szkoła Muzyczna I Stopnia w Siemiatyczach, ul. Leg. Piłsudskiego 1 |
| Number of electors | 1 482 |
| Number of dispensed ballot cards | 579 |
| Number of valid ballot cards | 579 |
| Number of votes valid | 576 |
| Number of votes invalid | 3 |
| Number of dispensed ballot cards for plenipotentiaries | 0 |
| Protocol date | 05-12-2010 22:28 |
| No. | Family name and given names | Age | Education | Address, party membership and endorsements | Number of votes | Votes % | |
| 1 | Andruszkiewicz Krzysztof Zygmunt | 45 | wyższe | Siemiatycze, submitted by KOMITET WYBORCZY WYBORCÓW KRZYSZTOFA ANDRUSZKIEWICZA RAZEM DLA SIEMIATYCZ, not a member of any political party | 275 | 47,74% | |
| 4 | Siniakowicz Piotr | 34 | wyższe | Siemiatycze, submitted by KOMITET WYBORCZY PLATFORMA OBYWATELSKA RP, member of Platformy Obywatelskiej Rzeczypospolitej Polskiej | 301 | 52,26% | |
| Vote on 21-11-2010 | |
| Office | Burmistrz Miasta Siemiatycze |
| Precinct | Precinct no. 3 |
| Electoral Commission Regional Headquarters | Szkoła Muzyczna I Stopnia w Siemiatyczach, ul. Leg. Piłsudskiego 1 |
| Number of electors | 1 483 |
| Number of dispensed ballot cards | 707 |
| Number of valid ballot cards | 707 |
| Number of votes valid | 704 |
| Number of votes invalid | 3 |
| Number of dispensed ballot cards for plenipotentiaries | 0 |
| Protocol date | 21-11-2010 23:24 |
| No. | Family name and given names | Age | Education | Address, party membership and endorsements | Number of votes | Votes % | |
| 1 | Andruszkiewicz Krzysztof Zygmunt | 45 | wyższe | Siemiatycze, submitted by KOMITET WYBORCZY WYBORCÓW KRZYSZTOFA ANDRUSZKIEWICZA RAZEM DLA SIEMIATYCZ, not a member of any political party | 280 | 39,77% | |
| 2 | Komuda Grażyna Małgorzata | 40 | wyższe | Siemiatycze, submitted by KOMITET WYBORCZY WYBORCÓW LEPSZE JUTRO, not a member of any political party | 31 | 4,40% | |
| 3 | Olszewski Jan | 55 | wyższe | Krupice, submitted by KOMITET WYBORCZY WYBORCÓW POROZUMIENIE SAMORZĄDOWO LUDOWE, not a member of any political party | 37 | 5,26% | |
| 4 | Siniakowicz Piotr | 34 | wyższe | Siemiatycze, submitted by KOMITET WYBORCZY PLATFORMA OBYWATELSKA RP, member of Platformy Obywatelskiej Rzeczypospolitej Polskiej | 293 | 41,62% | |
| 5 | Trochimiak Mariusz Andrzej | 46 | średnie | Siemiatycze, submitted by KOMITET WYBORCZY PRAWO I SPRAWIEDLIWOŚĆ, member of Prawa i Sprawiedliwości | 63 | 8,95% | |