Current cravings for more are taking a great toll on the Earth and its most vulnerable communities. The rise in ’fast furniture’ has contributed to this issue, popularizing the idea that furniture can be cheap, to the point of being disposable. To understand the size of this issue and how much more damage to the environment might be in store if these trends continue, we need to measure the amount of the furniture stock now and project what might be needed in the future. Currently, there is a knowledge gap in understanding how much furniture is in our homes, especially on a national scale. This thesis aims to quantify the stock and flows of household furniture materials in the US, distinguished by income and area type (i.e., urban or rural). To inform strategies toward circularity in household furniture, a second object of the study is to investigate the effects of repair and reuse – lifetime extension strategies – on the behavior of the American household furniture stock. To quantify the stock of furniture units, the average number of furniture units per m2 of residential floor space was collected using a bottom-up approach. The results were scaled to the national level using residential floor space data from the Integrated Model to Assess the Global Environment (IMAGE), scenario SSP2. Dynamic stocks and flows were calculated based on projected changes in residential floor space to understand how the stocks and flows might behave over time. The lifetime extension scenarios were simulated by extending the lifetime and adding mass (for repair) of a percentage of the furniture in the stock. Overall, demand for household furniture is not expected to saturate until the end of the 21st century. The highest-earning quintile owns half of the furniture stock mass, and material inequality is expected to remain until the end of the century in the base case. Urban residents own a majority of the household furniture and are expected to own a larger share as urbanization continues. About three-quarters of the furniture stock is wood-based, presenting opportunities for carbon storage but challenges in the volume of hard-to-recycle and low-durability particleboard. Circularity efforts to decrease furniture demand should target higher-income groups and separate strategies for lower-income groups should aim to increase affordability and access to more durable furniture. Urbanization also presents opportunities for local furniture circularity projects and hubs to attract skilled furniture repairers and secondhand distributors.