Birchwood is a village in Washburn County, Wisconsin, United States. The population was 402 at the 2020 census. The village is located within the Town of Birchwood. Knapp, Stout and Company was a logging company in Northern Wisconsin. Founded in 1846 William Willson brought the company together. The company was originally owned by; William Wi…Birchwood is a village in Washburn County, Wisconsin, United States. The population was 402 at the 2020 census. The village is located within the Town of Birchwood. Knapp, Stout and Company was a logging company in Northern Wisconsin. Founded in 1846 William Willson brought the company together. The company was originally owned by; William Wilson, Andrew Tainter, John Knapp, and Henry Stout. Knapp, Stout and Co. became the largest lumber company in the world. In 1873 they owned 115,000 acres of pine forests. They put out 55,000,000 ft. of lumber, 20,000,000 shingles, and 20,000,000 lath annually. The company owned six big farms with six, or seven thousand acres of improved land to supply the lumber camps with pork and wheat.