Verse 1:

There's a [G]feeling comes a-[D7]stealing,
And it [G]sets my brain a-[D7]reeling,
When I'm [G]listening to the music of a [A7]military [D7]band.
Any [G]tune like "Yankee [D7]Doodle"
Simply [G]sets me off my [D7]noodle,
It's that [E7]patri[Am]otic [E7]something [Am]that no [A7]one can [D7]under[G]stand.

[G]"Way down South, in the land of cotton",
[E7]Melody un[A7]tiring,
Ain't [D7]that in[G]spiring?
Hurrah! Hurrah! [G7]We'll join the Jubi[G]lee!
[D7]And that's going some,
For [G]the Yankees, by [Dm]gum!
[E7]Red, white and blue, [Am]I am for you! [F7]
[Am]Honest, you're a grand old [D7]flag! [Gm] [D7]

Chorus:

[D7]You're a [G]grand [C]old [G]flag,
[D]You're a [C]high fly[Bm]ing [G]flag,
[D7]And for[G]e[D7]ver in [G]peace may you [D7]wave.
You're [Am7]the [D7]em[Am7]blem [D7]of the [G]land [B7]I [Em]love,
The [Am]home of the free and [Cm]the [D7]brave. [Am] [F7] [D7]

[D7]Ev'ry [G]heart [C]beats [G]true
[D7]'Neath the [G]Red, White [Bm]and [G]Blue.
[Bm]Where [G7]there's [E7]never a boast or a [Am]brag.
[D7]But should [G]auld [D7]ac[G]quaintance [D7]be [Ddim]for[D7]got,
[D7]Keep your [A7]eyes on the [C]grand [D7]old [G]flag!

Verse 2:

I'm a cranky hanky panky,
I'm a dead square, honest Yankee,
And I'm mighty proud of that old flag
That flies for Uncle Sam.
Though I don't believe in raving
Ev'ry time I see it waving,
There's a chill runs up my back that makes me glad I'm what I am.

Here's a land with a million soldiers,
That's if we should need 'em,
We'll fight for freedom!
Hurrah! Hurrah! For every Yankee tar
And old G.A.R.
Ev'ry stripe, ev'ry star.
Red, white and blue,
Hats off to you
Honest, you're a grand old flag!

Chorus

Interesting article about George M. Cohan, Michio "Mike" Hirano (his Japanese valet), and You're a Grand Old Rag here.