links without www and with www

[yoyo1]

Some sites are pointing to me without the 'www' part. Will this affect my PR in Google negatively?

[Brett_Tabke]

no.

[Black Knight]

PageRank is calculated for each specific URL - if some of your links include the www, and some do not, the PageRank will not all be going to the same URL.

Links to your domain without the www prefix will not harm you, but neither will they do as much to help the PR of the www version of the url.

Consider using the BASE Tag HREF attribute to ensure that the www. prefix is always there on all your internal links, or alternately use a javascript to reload/replace the URL to include the www subdomain.

[ciml]

Personally I would steer clear of the Javascript reload/replace approach. Google won't follw the Javascript redirect or see the replacement content, but if Google decide at some point that Javascript redirects are a problem then you could get caught up in a filter of some sort.

If you have the same content available at both addresses, and normally use the www address, then sites pointing to you without the 'www' will be counted for your www PageRank if the two addresses were identified as by Google duplicates and merged.

You can check the Google cache for each URL to see if Google merged the records. The "This is G o o g l e's cache of ..." line will be the same if they are merged.

If they're not merged, then I would suggest a 301 status HTTP redirect (if you control your hosting) or the BASE href approach mentioned by Black_Knight.