Is France the U.S.'s oldest ally, or just first ever ally? or does a different country hold that distinction?

Who wants France as an ally?. Not exactly dependable when the going gets tough. 

Certainly our first, and thus oldest, ally.  Without French support, the Americans could not have won the War of Independence.  

Yes, but they were also our first enemy, not counting the British of course. From 1798 - 1800 the US and France fought an undeclared naval war in the Atlantic and Caribbean known as the Quasi War. 

https://en.wikipedia.org/wiki/Quasi-War

France (together with Spain and some German city republics like Bremen) is the oldest ally and first  country to acknowledge the USA as an independent nation. Uneducated people who are ignorant of this also complain about the French being weak and even cowards.

France was the first country to acknowledge the USA as a separate and free nation.  And they did supply support for the USA during the Revolutionary War.  

But it probably had les to do with supporting the USA and more to do with opposing the British who were they main rival in everything at that time.  They were more interesting in hurt the British then helping the Americans.

If you want to know about US history, why not read a few books about it from your public library?  DEWEY DECIMAL CLASS 973. 

Most answers here are from people who remember the history lessons learned in high school, layered with the icing of politicians' speech making on national holidays.

https://www.torontopubliclibrary.ca/search.jsp?Ntt...

France was the first country to recognise the United States as a sovereign nation. The French were instrumental in the American victory in the Revolutionary War. The United States didn't have any allies before the French sided with them and considering that the United States and France are still allies today, that means that the French are both the Americans' first and oldest ally. The Americans repaid this debt to France by claiming that they owed nothing to the French Republic as it had been the French monarchy who'd assisted them in their fight against Britain. Americans tend to leave that bit out when discussing their relationship with the French. 

Be careful which 'revolution' you are asking about, since the French Revolution occurred not long after American independence from Britain.

Note also, if consulting British sources, that many Britons call that war 'The War of American Independence', or 'The American War of Independence' - no mention of 'revolution'.   I was 60 years old or more before I came across the term 'revolution' connected with American independence.   Previously I had always associated 'revolution' with extreme left-wing notions, as in the French and Russian Revolutions.

Some British slave traders were still shipping black African slaves to North America during that war.

They did more than "support" the US, they won the war for them.

I know they sold us almost what is 1/3 of the US lower 48 states known as The Louisiana Purchase in 1803. If it wasn't for France and the martyred Jesuit Priests the Native Tribes would not have trusted the white man to be as brave and true as the martyred Saints exemplified the white man was not.