The region behind the belly button is referred to as the umbilical region, and it contains parts of the stomach, small and large intestine, and pancreas. Therefore, there are several organs located behind the belly button, including:

• Stomach
• Small intestine
• Large intestine
• Pancreas

However, it is important to note that the exact origins of abdominal pain can be tricky to pinpoint, and pain around the belly button can be caused by various conditions. Some of these conditions include gastroenteritis, appendicitis, and small bowel obstruction. If you are experiencing pain around or behind your belly button, it is important to seek medical attention to determine the underlying cause.