Hammacher Schlemmer
| Company type | Private |
|---|---|
| Industry | Retail |
| Founded | 1848 |
| Founder | Charles Tollner |
| Fate | Acquired by S5 Equity |
| Headquarters | , United States |
| Website | hammacher |
Hammacher Schlemmer (/ˈhæməkər ˈʃlɛmər/) is an American retailer and catalog company based in Niles, Illinois. A going-out-of-business sale was initiated in October 2025, with hints of a relaunch in the future.