U.S. Citizen, German born will this help getting into Germany?

If neither of your parents was a German citizen when you were born, it is very unlikely you are a German citizen. Germany does not practice universal birthright citizenship (unlike Canada or the United States) -- if you were born in Germany prior to 2 February 1990 being born on German soil to non-German parents almost absolutely means you are not a German citizen.

If one or both of your parents were German citizens, see this page -- depending on what your situation was you may already be a German citizen.

You'd better call the nearest German Consulate and get their answer. As you can see, its not that simple if you were born to Americans in the service.

I don’t think you will be allowed entry by birth if you don’t have a German/ E.U. passport .

I was born in France , to a French father and Canadian mother , and had a French passport with landed immigrant status till I was 18 - when I then applied for Canadian citizen ship - so have a Canadian passport . I could have and likely still could apply for a E.U. passport - but now not so sure . I don’t think my Canadian passport that does clearly say place of birth “ France “ will get me in if they close borders to non citizens

And there could be 'point of origin/departure' restrictions, i.e., even a citizen returning could be subject to quarantine.

As others have already said, your specific circumstances ( unknown to the forum) will undoubtedly impact what you will be able to do.

You would have to carry a German passport to prove citizenship. Being born in Germany is not an automatic right to citizenship. If you have extended German family, then I assume that one of your parents/Grandparents may have been German? Either way, German law on citizenship is complex and you would have to go through the process of seeing whether you were even eligible to apply for citizenship to get a passport. Additionally, some countries do not "allow" dual citizenship and force you to choose. Other countries just "discourage" dual citizenship. I have dual citizenship (US and British) and carry both passports as it is allowed under UK law. However, I have decided not to travel during these times. Even though I have the whole summer off and have had the time to quarantine, I just don't want to put anyone's health at risk on either side of the Atlantic.

I am waiting to see what next summer looks like.

Margaret

Even with German citizenship my DH, traveling from virus-ridden U.S.A., would need to quarantine after landing in Germany. As long as there's a problem here, I don't see any shortcut for you.

No, it will not help you get in. The EU entry restrictions are not based on nationality, they are based on the infection rate in the country you are coming from. The infection rate in the US is more than an order of magnitude higher than the EU limit and accelerating rapidly. The chances of getting it reduced by December are Slim and None, and Slim just left town. I am sorry for your situation having already cancelled a September trip, but I have to say that the way this pandemic is being mismanaged I am starting to worry that next September may not be realistic either. I will be 80 next year, and my supply of 'next years' is running out.

“my supply of 'next years' is running out.”

Irv, that is so poignant. And can be true for any of us. I hope you (we all) have many more. My dad lived to 97, and my grandmother 100, they would have referred to you as young!

The EU entry restrictions are not based on nationality, they are based on the infection rate in the country you are coming from.

True that they're not based on nationality, but rather than being based on what country you're coming from, they're based on your residence. So a US resident who manages to get to a country that is exempt from the EU travel restriction cannot avoid the ban by then flying to an EU country.
As for the OP's question, Annex 2 lists the various exceptions to the ban. https://data.consilium.europa.eu/doc/document/ST-9208-2020-INIT/en/pdf

According to the EU directives outlined last month, as a Spanish/EU citizen with US residency I can hop on a flight to Spain right now, getting back to the US though may be a bit of challenge ;-)

Where temporary travel restrictions continue to apply to a third country, the following
categories of persons should be exempted from the travel restriction, independent of the
purpose of travel:

(a) Union citizens within the meaning of Article 20(1) TFEU and third-country nationals
who, under agreements between the Union and its Member States, on the one hand,
and those third countries, on the other hand, enjoy rights of free movement
equivalent to those of Union citizens, as well as their respective family members;
(b) third-country nationals who are long-term residents under the Long-term Residence
Directive16 persons deriving their right to reside from other EU Directives or national
law or who hold national long-term visas, as well as their respective family members.

From my understanding of your situation, you do not fall into either category set above

Source: https://data.consilium.europa.eu/doc/document/ST-9208-2020-INIT/en/pdf

These questions can only be answered by the German consulate, which employs professionals who are paid to know the law.