This is a difficult question to answer definitively, as the term "stationery store" can be interpreted in a variety of ways. Generally speaking, though, a stationery store is a retailer that specializes in selling paper products and office supplies. There are certainly many stationery stores throughout the United States. However, it's difficult to say exactly how many there are, as the industry is not well tracked. According to the National Retail Federation, the stationery and gift store sector accounted for $10.6 billion in sales in 2017. This accounts for about 1.5% of total retail sales in the country. It's safe to say that the number of stationery stores in the United States is growing. The demand for paper products and office supplies is relatively stable, and as the economy continues to grow, more and more people are opening their own businesses. This has led to an increase in demand for stationery products and supplies.