But “yes” neither ends in -og nor rhymes with those other words. 
This. Song, long, and wrong are kinda like saw-ng, law-ng, raw-ng, but gong is like gah-ng.
AFAIK I have a pretty generic American accent, I’ve lived in several parts of the county.
I pronounce them exactly this way, with exactly the same distinction. Born & raised in Southern California. My mother was from Canada, though; doesn’t **suranyi **also have a partly Canadian background?
I wonder how much one’s position on this “ong” debate correlates with whether one pronounces “Mary,” “merry”, and “marry” differently or not. For the record, they are three entirely distinct sounds.
We are brethren!
To paraphrase Bart Simpson: I am happy, I am merry, I got a rhyming dictionary.
It says song, long, wrong, gong, prong, and Hong Kong rhyme.
I’m English, and they all rhyme to me!
Mary marry merry are all different, cot and caught are different, but all the long, strong, gong, thong words are all /ɒ/ and all rhyme in my accent!
Not to me.
Nope. Mary, Merry, and Marry are all distinctly different in my accent too, despite not agreeing with you on those ng words. Cot/caught and tot/taught, on the other hand are the same, though. Don/Dawn too.
This. For me, gong has the vowel of father. The other three have the vowel of ball.
I do indeed. Partly Canadian and partly American. I was a very mixed-up kid.
Oddly, this is another case where I pronounce them differently while most Americans don’t.
By the way, I agree with the various posters who have mentioned that using the IPA would have made things clearer. I’m just not familiar enough with it to use it easily.
IIRC, you’ve spent long periods of time in California and in Pennsylvania. It could be that your speech is an unusual blend of the typical patterns from each of those places. (California is famous as Ground Zero for leveling several sounds into what sounds to many like a kind of “ah,” a tendency which has since spread, with varying degrees of penetration, into much of the rest of the US).
Wikipedia has an easy to use IPA Vowel chart with audio.Try to match up your pronunciation of the vowel sounds in “song”, “long”, and “wrong” with those on the chart.
In my accent, “song” most closely matches /ɑ/.
In rapid speech, “long” and “wrong” can use either /ɑ/ or /ɒ/. When I want to emphasize the word, as in “It’s a looooong way,” or “That is just wrong!”, the vowel comes out as a slightly nasalized /ɒ/.
In my accent I do not merge cot and caught.
My dialect (Chicago/Great Lakes/Inland North American) is not part of the caught and cot merger. Those are distinct vowel sounds. “Caught” has what I would call an “aw” and “cot” has would I would call an “ah” if I were not to delve into IPA. All the words in the OP have the “aw” sound in my dialect. And the majority of Americans do not merge “caught” and “cot.” Depending on what survey you read, the estimate is about 25%-40% of American speakers merge them.
Song and long rhyme.
Caught and cot don’t.
But I was just told yesterday that I have the worst Chicago accent this person as ever heard (and he told me the same thing last fall but doesn’t remember that), so what do I know.
They all rhyme to me.
Dong
Gong
Hong Kong
Long
Song
Tong
Wrong
Yup, they all rhyme.
So, does that mean you talk “normal”? 
If you go through the alphabet I think you’ll find that every four letter word that ends with “ong” rhyme.
ETA: except oong.
I was responding to Eyebrows Of Doom in post #30. He said “dog” and “log” don’t rhyme. Since I posted right below him, I didn’t bother to quote him.
Never mind. I just felt a strong rush of wind right over my head. :smack: