| Jacquelyn J. Lahn | |
| State: | Wisconsin |
| State Assembly: | Wisconsin |
| District: | 93rd |
| Term Start: | January 2, 1989 |
| Term End: | January 7, 1991 |
| Predecessor: | Mark D. Lewis |
| Successor: | Joseph C. Hisrich |
| Birth Date: | 3 August 1952 |
| Birth Place: | Eau Claire, Wisconsin, U.S. |
| Residence: | Osseo, Wisconsin |
| Spouse: | married |
| Occupation: | real estate appraiser |
| Allegiance: | United States |
| Branch: | United States Army |
| Serviceyears: | 1972 - 1977 |
Jacquelyn J. Lahn (born August 3, 1952) is a retired American real estate appraiser and Republican politician. She served one term in the Wisconsin State Assembly (1989 - 1991), representing Eau Claire County.
Lahn was born on August 3, 1952, in Eau Claire, Wisconsin, and attended Osseo-Fairchild High School.[1] She attended the University of Wisconsin–Eau Claire and served in the United States Army from 1972 to 1977.
Lahn was elected to the Assembly in 1988. She is a Republican.