CW TV Show Ratings for 2010-11 Season [as of 4/28/11]

There were both some huge gains and losses on the CW network. Despite the fact that there are just a few more episodes of Smallville left, the ratings took a huge dive. Supernatural fell almost as much. Nikita fell once again and the timing couldn’t be worse. Conversely, America’s Next Top Model saw a huge gain and Vampire Diaries’ wasn’t too shabby either.

Which CW TV shows will be cancelled or renewed depends mostly on the series’ ratings. The network puts a lot of importance on the female 18-34 demographic where most others focus on the 18-49 demo. Before we get to the season-to-date averages, here are the winners and losers from April 21st through April 28th — based on the 18-34 female demo, as measured against the last original episode.

Week-to-Week Gains: Gossip Girl 1.7/5 (+6.2%), America’s Next Top Model 1.8/5 (+63.6%), and The Vampire Diaries 1.9/6 (+26.7%).

No Change: One Tree Hill 1.3/4

Week-to-Week Losses: Smallville 0.5/2 (-37.5%), Supernatural 0.6/2 (-33.3%), 90210 1.3/4 (-13.3%), Hellcats 0.7/2 (-12.5%), and Nikita 0.7/2 (-12.5%).

Wonder if your favorite CW show’s been renewed or cancelled? Check out our comprehensive list. We’ll keep updating it as new info becomes available.

Below is a list of the regular CW TV shows and their 2010-11 season average ratings to date. It only incorporates the ratings for original episodes and not repeats. The data is sorted by the 18-34 female demographic averages. The closer a show is to the bottom, the more likely it is to be cancelled. Friday is one of the least-watched nights of TV so those shows are expected to get lower numbers.

W 18-34 demo rank	TV Shows	Average viewership (in millions)	Average 18-49 demo rating	Average women 18-34 demo	Compared to last week
1	The Vampire Diaries renewed)	3.21	1.5	2.3	---
2	Gossip Girl renewed)	1.71	0.9	2.0	---
3	One Tree Hill	1.87	0.9	1.7	---
4	90210 renewed)	1.80	0.9	1.6	---
5	Hellcats	1.98	0.8	1.4	---
6	Life Unexpected (cancelled)	1.52	0.7	1.3	---
7	Nikita	2.44	0.9	1.1	---
7	Supernatural renewed)	2.30	1.0	1.1	---
9	Smallville (ending)	2.58	1.1	0.9	---
1	ANTM (fall, renewed)	2.87	1.3	2.1	---
2	ANTM (spring, renewed)	2.04	1.0	1.6	---
3	Shedding for the Wedding	0.98	0.4	0.7	---

Raw data: © The Nielsen Company via Media Week.

What do you think? Any surprises? Which shows do you think won’t survive to see a new season?