West Mansion is a mansion in the West End of Portland, Maine, United States. Completed in 1911, to a design by noted architect Frederick A. Tompson, the mansion's first owner was George F. West, for whom it is named. Located on Bramhall Hill, at the intersection of Western Promenade and Carroll Street, the building is regarded as a Portland landmark, alongside the Portland Observatory on Munjoy Hill and Victoria Mansion in the downtown area. Greater Portland Landmarks describes the home as "palatial" in its scale and architectural style.