You will find multiple resources for administrative assistant jobs online. Here are a few that are specific to administrative assistant jobs:
Administrative Jobs (http://www.administrativejobs.com/) - You will find listings of administrative jobs divided by location and skill.
International Association of Administrative Professionals (http://www.iaap-hq.org/careers/) - The professional organization offers memberships with benefits for their members. Also, they have an online job board with postings around the country.
I hire secretarial (http://www.ihiresecretarial.com/) - This site lists hundreds of administrative jobs for every industry. Your resume can be posted to be available to employers in your area.
Jobs Net site(http://jobs.com/administrative-assistant_jobs_15) - This Job Net site shows administrative assistant jobs by location, by date posted, and by industry. You can also post a resume.
Administrative Assistant Jobs (http://www.theadministrativeassistantjobs.com/) - This site lists jobs not only in the United States, but around the world. You can search by industry, pay level, and location.
Indeed.com (http://www.indeed.com/q-Administrative-Assistant-jobs.html) - This site allows you to post a resume, search for jobs, and contact recruiters for administrative assistant jobs. You can also get email updates for jobs that have just been posted.