Yes, the Epson 664 ink series includes yellow ink. This ink series is commonly used in Epson EcoTank printers, and the yellow ink bottle is specifically designed for color printing alongside cyan and magenta. If you need to replace the yellow ink in your printer, look for the Epson 664 Yellow ink bottle. It's essential to ensure compatibility by checking your printer's manual or the Epson website for the exact ink specifications for your printer model. This helps maintain print quality and prevents potential issues with your printer.