Is Napoleon Bonaparte's bloodline still alive?

Yes, Napoleon Bonaparte's bloodline is still alive today through his siblings and through his illegitimate children, but not through a direct legitimate male line from his son. Napoleon had one legitimate son, Napoleon II, also known as the King of Rome, born to his second wife Marie Louise in 1811, who died in 1832 at age 21 of tuberculosis without having children, so Napoleon's direct legitimate line ended. However, Napoleon had at least two known illegitimate sons who had descendants. Charles Leon, born to his mistress Eleonore Denuelle in 1806, and Count Alexandre Colonna-Walewski, born to his Polish mistress Maria Walewska in 1810, both had children, and their descendants are alive today, particularly the Walewski family in France and Poland. More importantly, Napoleon's extensive bloodline continues through his eight siblings, especially his brothers Joseph, Louis, and Jerome Bonaparte, whose descendants form the House of Bonaparte. The current head of the House of Bonaparte and pretender to the French imperial throne is Jean-Christophe Napoleon, born in 1986, who is a descendant of Jerome Bonaparte, Napoleon's youngest brother. He works in finance in London and is recognized by Bonapartists. Napoleon's brother Louis Bonaparte was the father of Napoleon III, whose line also continued. So while no direct legitimate grandson of Napoleon I exists, the broader Bonaparte family bloodline is very much alive with many living members in France, the US, and elsewhere.