Do I still qualify for head of household because my adult sister lives with me but my daughter doesn't?

You qualify for the Head of Household status if you:

1. Were unmarried as of December 31, 2015 and
2. Paid more than half the cost to run your home (or the home of a qualifying parent) in 2015 (rent, mortgage, utilities, etc.) and
3. Supported a qualifying person.

A Qualifying Person is: 

https://ttlc.intuit.com/replies/4791157