| Office: | Member of the Cook County Board of Commissioners |
| Term Start: | 1994 |
| Term End: | 2002 |
| Predecessor: | district established |
| Successor: | Forrest Claypool |
| Constituency: | 12th district |
| Constituency1: | Chicago |
| Term Start1: | 1990 |
| Term End1: | 1994 |
| Successor1: | district disestablished |
| Office2: | Member of the Illinois Senate |
| Term Start2: | 1983 |
| Term End2: | 1993 |
| Office3: | Member of the Illinois House of Representatives |
| Term Start3: | 1969 |
| Term End3: | 1983 |
| Birth Date: | December 20, 1938 |
| Birth Place: | Chicago, Illinois, U.S. |
| Death Date: | January 5, 2009 (age 70) |
| Death Place: | Chicago, Illinois |
| Party: | Democratic |
| Education: | Wright Junior College North Park University |
| Rank: | First lieutenant |
Thaddeus S. "Ted" Lechowicz (December 20, 1938 - January 5, 2009) was an American politician and businessman.
Born in Chicago, Illinois, Lechowicz went to Weber High School in Chicago. He received his associate degree from Wright Junior College and then in 1960 received his bachelor's degree in economics from North Park University. Lechowicz also did graduate work at DePaul University. Lechowicz served in the United States Army and was a first lieutenant. He worked in systems analysis and programming for the Cook County, Illinois Circuit Courts and was involved with the Democratic Party. Lechowicz served in the Illinois House of Representatives from 1969 to 1983. He then served in the Illinois Senate from 1983 to 1993. Lechowicz also served in the Cook County Board of Commissioners from 1990 to 2002. Lechowicz died at his home in Chicago, Illinois from heart failure.[1] [2] [3]