Theodore Roosevelt Jr. was born on October 27, 1858, at East 20th Street in New York City.

When he entered Harvard College on September 27, 1876, his father advised: "Take care of your morals first, your health next, and finally your studies".

On his 22nd birthday in 1880, Roosevelt married socialite Alice Hathaway Lee.

Roosevelt was a member of the New York State Assembly (New York Co., 21st D.) in 1882, 1883 and 1884.

On December 2, 1886, Roosevelt married his childhood and family friend, Edith Kermit Carow.

The 1898 New York state election was held on November 8, 1898, to elect the Governor, the Lieutenant Governor, the Secretary of State, the State Comptroller, the Attorney General, the State Treasurer and the State Engineer, as well as all members of the New York State Assembly and the New York State Senate.

Roosevelt took office as vice president in March 1901.

The Presidency of Theodore Roosevelt on September 14, 1901, when Theodore Roosevelt became the 26th President of the United States upon the assassination and death of President William McKinley, and ended on March 4, 1909. Roosevelt had been the Vice President of the United States for only 194 days when he succeeded to the presidency. A Republican, he ran for and won a full four-year term as president in 1904, easily defeating Democratic nominee Alton B. Parker. After the Republican victory in the 1908 presidential election, Roosevelt was succeeded by his protégé and chosen successor, William Howard Taft.

The United States presidential election of 1904 was the 30th quadrennial presidential election, held on Tuesday, November 8, 1904. Incumbent Republican President Theodore Roosevelt defeated the Democratic nominee, Alton B. Parker. Roosevelt's victory made him the first president to win a term in his own right after having ascended to the presidency upon the death of a predecessor.

On October 14, 1912, while campaigning in Milwaukee, Wisconsin, Roosevelt was shot by a saloonkeeper named John Flammang Schrank. The bullet lodged in his chest after penetrating his steel eyeglass case and passing through a thick (50 pages) single-folded copy of the speech titled "Progressive Cause Greater Than Any Individual", which he was carrying in his jacket.

On the night of January 5, 1919, Roosevelt suffered breathing problems. After receiving treatment from his physician, Dr. George W. Faller, he felt better and went to bed. Roosevelt's last words were "Please put out that light, James" to his family servant James Amos. Between 4:00 and 4:15 the next morning, Roosevelt died in his sleep at Sagamore Hill after a blood clot had detached from a vein and traveled to his lungs.

His father's sudden death on February 9, 1878, devastated Roosevelt, but he eventually recovered and doubled his activities. Roosevelt gave up his earlier plan of studying natural science and instead decided to attend Columbia Law School, moving back into his family's home in New York City.