This resource update provides an overview of forest resources in Wisconsin based on an inventory conducted by the USDA Forest Service, Forest Inventory and Analysis (FIA) program at the Northern Research Station in cooperation with the Wisconsin Department of Natural Resources. Estimates are based on field data collected using the FIA annualized sample design and are updated yearly. In Wisconsin, annual inventory years 2001-2013 had a cycle length equal to 5 years. Beginning in 2014, the cycle length was changed to 7 years. For the 2017 inventory, estimates such as area, volume, and biomass are based on 6,411 forested field plots collected from 2011-2017. The 2017 change variables, such as net growth, removals, and mortality, are based on plots collected in 2006 to 2011 and resampled in 2011 to 2017. See Bechtold and Patterson (2005) and O'Connell et al. (2015) for definitions and technical details.