Can American citizens obtain a visa on arrival in Thailand, and what is the length of stay?

American citizens cannot obtain a visa on arrival in Thailand; they can enter visa exempt for 30 days. Current regulations specify that visa on arrival is only applicable for certain nationalities and allows for a stay of up to 15 days. Additionally, an option for a 60-day visa can be sought from the embassy, which can be extended for another 30 days, or alternatively, travelers can perform a visa run to a nearby country.