Does a two year college have dorms?

Yes, and there is a list of them growing on wikipedia. Search Wikipedia for community colleges with campus housing and you will find the list.

They tend to be in areas where the population is spread out or housing costs are high.

There are 11 in California and there's one in New York called Sullivan community college. Theres one in Texas also a lot in Iowa and Michigan; one is called monroe community college and another is called kirtland. North Dakota has one that actually requires freshmen to live on campus, ND State College of Science.

You should check out

Howsyourhousing.com

How's your Housing is a socio-academic utility that helps college students make educated decisions about where to live.

By combining an extensive amount of geographic information directly from social networking data, it gives you virtual snapshots of the location's pro's and cons.

How's your Housing allows you access to post and read about EVERY house previously rented and EVERY Dorm at most campuses and lets you compare the prices, parking information, neighborhood information, neighborly relations, crime, and rental histories in the new place you are about to choose to live in.