| Wiek County | |
| Native Name: | Гапсальскій уѣздъ |
| Native Name Lang: | ru |
| Settlement Type: | Uezd |
| Mapsize: | 225px |
| Subdivision Type: | Country |
| Subdivision Name: | Russian Empire |
| Subdivision Type1: | Governorate |
| Subdivision Name1: | Estonia |
| Established Title: | Established |
| Established Date: | 1745 |
| Extinct Title: | Abolished |
| Extinct Date: | 1920 |
| Seat Type: | Capital |
| Seat: | Gapsal |
| Area Total Km2: | 4697.92 |
| Population As Of: | 1897 |
| Population Total: | 82,077 |
| Population Density Km2: | auto |
Wiek County (German: Kreis Wiek or German: Kreis Hapsal, Estonian: Lääne kreis, Russian: Гапсальскій/Викскій уѣздъ|Gapsalskiy/Vikskiy uyezd) was one of the four counties of the Russian Empire located in the Governorate of Estonia.[1] It was situated in the western part of the governorate (in the northwestern part of present-day Estonia). Its capital was Haapsalu (Hapsal). The territory of Wiek County corresponds to present-day Lääne and Hiiu counties, the westernmost part of Rapla County, and a small part of Pärnu County.[2]
At the time of the Russian Empire Census of 1897, Wiek County had a population of 82,077. Of these, 92.2% spoke Estonian, 5.6% Swedish, 1.2% German, 0.6% Russian, 0.2% Ukrainian, and 0.1% Latvian as their native language.[3]