You do not need to disclose the following details in your resume, cover letter or interview:
Your race, gender, ethnicity, nationality, religion
Your height, weight, age, etc.
Medical issues
Your marital status, dependents, children
Do not include a picture of yourself
Your Facebook or Twitter passwords (you also do not need to add a prospective employer to your social media accounts)
Do not provide references until asked
For those with disabilities:
If your disability is invisible and does not affect your work, then you are not obligated to provide disclosure. Additional information on disclosure for those with visible disabilities is provided here.