As of January 2010, there were 223,867 registered voters in Lehigh County:
Democratic: 112,412 (50.21%)
Republican: 76,904 (34.35%)
Other Parties: 34,551 (15.43%)
Lehigh County and neighboring Northampton County are part of Pennsylvania's 7th Congressional district.
The 7th Congressional district is a contentious swing district with neither Republicans nor Democrats winning the district consistently.
 Voters elected Republican Charlie Dent in 2004, 2006 and 2008 and, previously, Republican Pat Toomey in 1998, 2000, and 2002.
 In 2004, the county narrowly voted for John Kerry over George W. Bush for President, and in 2008 the county gave all statewide Democratic candidates significant leads and Barack Obama a victory of more than 15 points over John McCain, 57.1% to 41.5%.
In 2012, President Obama carried the county again, but by a narrower margin: 53.17% to 45.52%.

Presidential elections results

All five statewide winners carried it in November 2004.
Although the Republican Party has historically been dominant in county-level politics, the Democratic Party has made substantial inroads this decade.
In 2005, Bethlehem Mayor Don Cunningham unseated incumbent County Executive Jane Ervin to become the first Democrat to be elected to the office.
Four of the nine commissioner seats and all row offices except for the District Attorney have held by Democrats since winning two at-large seats in November 2007.
Lehigh County has a home-rule charter with four at-large and five district commissioners.
In 2006 Lehigh County voters approved a county-charter amendment to combine the offices of Clerk of Courts, Register of Wills, and Recorder of Deeds into the office of the Clerk of Judicial Records.
Clerk of Courts Andrea Naugle won the new office in November 2007.
As of January 2010, there were 223,867 registered voters in Lehigh County:
Democratic: 112,412 (50.21%)
Republican: 76,904 (34.35%)
Other Parties: 34,551 (15.43%)
Lehigh County and neighboring Northampton County are part of Pennsylvania's 7th Congressional district. The 7th Congressional district is a contentious swing district with neither Republicans nor Democrats winning the district consistently.  Voters elected Republican Charlie Dent in 2004, 2006 and 2008 and, previously, Republican Pat Toomey in 1998, 2000, and 2002.  In 2004, the county narrowly voted for John Kerry over George W. Bush for President, and in 2008 the county gave all statewide Democratic candidates significant leads and Barack Obama a victory of more than 15 points over John McCain, 57.1% to 41.5%. In 2012, President Obama carried the county again, but by a narrower margin: 53.17% to 45.52%.
Presidential elections results

All five statewide winners carried it in November 2004. Although the Republican Party has historically been dominant in county-level politics, the Democratic Party has made substantial inroads this decade. In 2005, Bethlehem Mayor Don Cunningham unseated incumbent County Executive Jane Ervin to become the first Democrat to be elected to the office. Four of the nine commissioner seats and all row offices except for the District Attorney have held by Democrats since winning two at-large seats in November 2007. Lehigh County has a home-rule charter with four at-large and five district commissioners. In 2006 Lehigh County voters approved a county-charter amendment to combine the offices of Clerk of Courts, Register of Wills, and Recorder of Deeds into the office of the Clerk of Judicial Records. Clerk of Courts Andrea Naugle won the new office in November 2007.
Lehigh County, Pennsylvania