How can I find the right Thai consulate to apply for a visa as an American?

Go by that map dude posted, they'll ask you for a proof of address document to prove you are applying at the right consulate. Each consulate handles evisa applications of persons residing in their district and that's the consulate you will contact with or receive contact from. Move fast, there's been tons of problems processing e-visas in the last few weeks, it's hit or miss.

Passport Holders from the USA Can Enter Thailand Without a Visa.

The VISA EXEMPTION RULE allows tourists from 64 countries to enter Thailand without a visa. They are granted to stay a maximum of 30 days if they are entering Thailand via an international airport.

Under the new provisions of the VISA EXEMPTION RULE and BILATERAL AGREEMENT effective December 31, 2016, passport holders of 64 countries are entitled to enter Thailand under this rule provided that they meet the following criteria:

The visit is strictly for tourism purposes.

They must have a confirmed return ticket to show that they are flying out of Thailand within 30 days of entry, as appropriate. Open tickets do not qualify. You may be asked to show your flight ticket on entering Thailand. If you do not possess a flight ticket to show you will be exiting Thailand within 30 days of entry you will be most likely refused entry.

It will also be necessary to prove that you have funds of at least 10,000 THB per person during your stay in Thailand.

You have to Apply for Thailand Pass by Yourself or get an agent online.

You may apply for the Thailand Pass directly on the MFA website:

If you have already applied by yourself and you need to check the status, please go to:

Do they not do e visa in US?

The US now uses e-visa, so you will apply at the evisa website regardless of where you live in the US. But if you need to follow-up after you've applied, you can use the map that Stuart linked.

Where u live ?