I'm originally from South Asia. I obtained US permanent resident status (Green Card) in October 2011. Although I didn't stay in USA due to some unavoidable reasons, I'm still maintaining my residency and I'm still a citizen of my country of origin.
I didn't do any schooling, academic or job-related activities in USA and currently I'm staying outside USA. I'm applying for Fall 2014. Question is, will I be considered as domestic or international applicant?
It's not that black and white. There are three reasons international students are treated differently. In order of importance (at least from my perspective), they are:
1. Funding sources and differing costs. You're probably somewhere in the middle here, but leaning to domestic. As a permanent resident, you'll cost domestic (state resident) tuition at most state schools where this matters, and probably qualify for most fellowships the school may have to give out, which increases the flexibility of how the school offers you funding and indirectly improves your chance of admission.
2. Language. You sound fluent. Mostly important because you (almost certainly) have to TA, and TA's that don't speak English don't attract undergrads. Regardless, you won't have to take the TOEFL, so probably a domestic in this regard.
3. Unknown undergrad. You're an international here, as it sounds like you went to school outside the US. As such, it's less likely that committee members will know your recommenders, or give you bonus points for a 'hard' or 'rigorous' undergrad degree.