Thomas Jefferson, the third President of the United States, died on July 4, 1826. He passed away at the age of 83. The primary cause of his death was believed to be natural causes associated with old age. Thomas Jefferson experienced a gradual decline in health during the last years of his life.

Several factors likely contributed to Jefferson's deteriorating health. He had suffered from various ailments, including chronic diarrhea, migraines, and rheumatism. Additionally, he had experienced the loss of loved ones, financial difficulties, and political challenges. It is also worth noting that Jefferson lived when medical knowledge and treatments were limited compared to today.

Specifically, Jefferson faced increasing health issues in the months following his death. He had been suffering from a condition known as uremia caused by kidney failure. This condition can lead to symptoms such as fatigue, weakness, loss of appetite, and mental confusion. Jefferson's health declined until he passed away on July 4, 1826.

It's important to note that during Jefferson's time, medical diagnoses were not as precise as today. The exact details of his medical condition may not be known with certainty, as medical records from that era are limited. However, based on the available information, it is generally accepted that Thomas Jefferson died of natural causes associated with his advanced age and declining health.