Sand Lake, Barron County - Critical Habitat Designation
| 1991 |
Shawano Lake, Shawano County- Critical Habitat Designation
| 2006 |
Shunenberg Lake, Bayfield County - Critical Habitat Designation
| 2007 |
Silver Lake, Barron County - Critical Habitat Designation
| 1997 |
Silver Lake, Kenosha County- Critical Habitat Designation
| 2006 |
Slim Lake, Washburn County-Critical Habitat Designation
| 2001 |
Smith Lake, Bayfield County - Critical Habitat Designation
| 2007 |
Solberg Lake, Price County - Critical Habitat Designation
| 2006 |
Spider Lake, Sawyer County- Critical Habitat Designation
| 2003 |
Spirit Lake, Burnett County- Critical Habitat Designation
| 1998 |
Spooner Lake, Washburn County-Critical Habitat Designation
| 2000 |
Spring Lake, Sheboygan/Ozaukee Counties- Critical Habitat Designation
| 2006 |
Stump Lake, Barron County - Critical Habitat Designation
| 1997 |
Swede Lake, Polk County-Critical Habitat Designation
| 1998 |
Sweet Lake, Bayfield County - Critical Habitat Designation
| 2007 |