One of the most popular websites that sell office furniture in the United States is Wayfair. Wayfair offers a vast selection of office furniture, including desks, chairs, storage units, and more, catering to both residential and commercial needs. The website's extensive inventory and user-friendly interface make it a go-to destination for those looking to furnish their office spaces.

The popularity of online retailers like Wayfair for office furniture can be attributed to several factors. Firstly, the convenience of shopping from the comfort of one's home or office is a significant draw. According to a report by Statista, online furniture sales in the United States reached $13.3 billion in 2020, reflecting a 10.3% increase from the previous year. This growth is a testament to the rising preference for online shopping among consumers.

Secondly, online retailers often provide competitive pricing and a wide range of options. Wayfair, for instance, offers a variety of styles, brands, and price points, allowing customers to find the perfect furniture for their needs and budgets. Additionally, the ability to compare products and read reviews from other customers helps in making informed purchasing decisions.

Moreover, online retailers like Wayfair often provide additional services such as free shipping, easy returns, and even assembly services, which further enhance the customer experience. These services are particularly appealing to businesses looking to outfit multiple offices or workspaces efficiently.

In conclusion, Wayfair is a leading website for purchasing office furniture in the United States, offering convenience, variety, and additional services that cater to the needs of both individual consumers and businesses. The growing trend of online furniture sales underscores the importance of online retailers in the office furniture market.