Utilikilts: Made in the USA
Sportkilt: I'm 99% positive they're made in the US, although certain things (i.e. sporrans) are from Pakistan.
Freedom Kilts: Made in British Columbia with American (I believe) fabric
R-Kilts: Made in Canada with Canadian and American parts
USA Kilts: Made in USA with material from UK
Amerikilts: Made in USA (not sure where material is from)
Stillwater: Made in Pakistan
Canadian Casual Kilts: Made in Canada

I'm not trying to exclude any company. I'm just listing the ones I know and am sure about.