This study examined meal patterns and protein-rich food utilization in the foodservice practices of public and private geriatric long-term care hospitals in South Korea. Over a period of 6 months, a total of 612 daily menus (306 from each hospital type, breakfast, lunch, and dinner) were collected from four hospitals (two public, two private). Each menu was categorized by meal composition, included staple food, soup, main dish, side dishes, and kimchi. The most common meal pattern consisted of a staple food, soup, main dish, two side dishes, and kimchi. Compared with private hospitals, public hospitals offered a greater variety in meal composition, staple foods, soups, and main dishes. However, no significant differences were observed in protein foods of main dishes. Overall, meat accounted for about half, whereas fish accounted for one-third. Approximately 30% of protein foods in main dishes were processed. In side dish 1, the proportion of protein-rich foods was lower in public than in private hospitals, whereas the proportion of processed foods exceeded two-thirds in both hospital, but was significantly higher in public hospitals. Soup was the second most important protein source after the main dish, with fish as the most often used; however, processed protein foods were also common. These findings indicate that the main dish and soup are the principal protein sources, and the relatively high inclusion of fish reflects a favorable pattern. However, to ensure intake of high-quality proteins by older adults, the high reliance on processed protein foods highlights the need to reconsider foodservice practices.