|Washington State Senate District 46|
| Term in office began|
| Term in office ended|
On May 17, 2010, Jacobsen announced he would not be seeking re-election, in part due to health problems.
Jacobsen attended both the University of Washington and Christchurch Teachers' College, New Zealand.
While a member of the Washington State Senate, Jacobsen served on the following committees:
- Agriculture and Rural Economic Development Committee, Washington State Senate
- Higher Education & Workforce Development Committee, Washington State Senate
- Natural Resources, Ocean & Recreation Committee, Washington State Senate, Chairman
- Transportation Committee, Washington State Senate
Senator Jacobsen did not run for re-election in 2010. 
In November 2006, Jacobsen was re-elected for the 46th District of the Washington State Senate receiving 41,948 votes.
Jacobsen raised $115,963 for his campaign.
|Washington State Senate, District 46 (2006)|
|Ken Jacobsen (D)||41,948|
|Brian Travis (R)||7,839|
In 2006, Jacobsen collected $115,963 in donations.
Listed below are the top four contributors to his campaign. 
|Washington State Patrol Troopers Association||$1,400|
|Public School Employees of Washington||$1,400|
|Washington Council of Police & Sheriff||$1,400|
Jacobsen is married to Rachel, a native of New Zealand, and he has two grown daughters.
- Ken Jacobsen on the Washington State Senate website
- Jacobsen state-sponsored website
- Legislative profile of Jacobsen on Project Vote Smart
- Biographical profile of Jacobsen on Project Vote Smart
- Campaign Contributions: 2008, 2006, 2004, 2002, 1998, 1996, 1994, 1992, 1990
- Washington Votes profile for Jacobsen
|Washington Senate District 46
| Succeeded by|