Republic is a city in Ferry County, Washington, United States. The population was 1,073 at the 2010 census, a 12.5% increase more than the 2000 census. It is the county chair of Ferry County. It was the largest mining camp in the Republic Mining District, and house to the “Hot Air Line” railway.

Republic is located at 48°38′53″N 118°44′6″W / 48.64806°N 118.73500°W / 48.64806; -118.73500 (48.648159, −118.734947). According to the United States Census Bureau, the city has a total Place of 1.59 square miles (4.12 km²), all of it land. Republic is located close the source of the Sanpoil River in a long graben valley bordered by the Okanagan Highlands to the west and the Kettle mountain range to the east. Curlew Lake, 7 miles (11 km) long (Elev: 2,400 ft (730 m)), provides fishing and boating to summer visitors northeast of Republic. Swan Lake is little mountain lake 14 miles (23 km) to the south of Republic and also serves to be a popular lake for local residents and tourists to visit. Republic is amid the Colville National Forest and to the south is the Colville Indian Reservation.

Republic was founded by gold prospectors in the late 19th century. Mining claims were first made along Eureka Creek upon March 1, 1896, after the northern half of the Colville Indian Reservation was vacated on February 21. On March 5, 1896, the Republic claim was staked by Thomas Ryan and Philip Creasor along Granite Creek, another branch of the Sanpoil River. The resulting Republic Mine eventually became the highest producer of gold in the county. On April 18, 1896, the Republic Mining District, originally called the Eureka Mining District, was established. The first ore mill for giving out low grade ore in the district was constructed in May, 1898, while highest grade ores were hauled 80 mi (130 km) east to Marcus, Washington partway by cart and next via the Spokane Falls & Northern branch descent for the long-lasting distance. Between 1899 and 1900 stamp mills were build up at the Mountain Lion mine in the northwest portion of camp and the Republic Mine in the south resulting in a brief times where anything of the district’s ore was milled in the camp. The Mountain Lion Gold Mining company 100-ton mill used a engagement of mercury plate interest followed by MacArthur-Forrest cyanide leaching. However, due to much demean gold and silver recovery rates, combined when the soon to reach rail lines, the mill was soon shut down. The 200-ton Republic mill processed the ore by first roasting of the finely crushed ore, and later cyanide leaching, with the first large quantity of ore subconscious processed in October 1900. In July 1901 the Republic mine and mill both shut down due to milling cost, and a nonexistence of satisfactory profitable ore monster recovered. Ores in the Republic District were noted to have increasing percentages of silver engagement in the degrade portions of the ore bodies, and the Republic mill did not provide higher than a 50% return on assayed ore value, dooming the mill. The Republic mine remained inactive until 1902 next the introduction of railroads in the town made mining profitable again. From 1902 to 1909 ore was freighted north to British Columbia and next west to smelters upon the coast for processing, with periods where shipments up to 1,000 st (6,400 kg) of ore a week were regular.

The Republic mining District encompassing Republic and the surrounding areas, had no defined borders as of 1909 later the pubertal geologist Joseph B. Umpleby visited, but included six townships with a center “a Tiny west of the south decrease of Curlew Lake”. At the become old of the visit Republic was the most important mining camp in the county and the largest later than a population of on 1,500.