Best Astrology Sites lists the top 60 Astrology Sites based on traffic as ranked on Alexa 

Rank Score Site Title
 1     4698   Astrology.com
 2     4971   Astrodienst
 3     8754   Ganesha Speaks
 4   10422   Jonathan Cainer
 5   10915   Astrology Zone
 6   12648   Astro Center
 7   19191   Cafe Astrology
 8   32995   Astroyogi.com
 9   33101   Russell Grant
10   54170   Astrology on the Web
11   77355   Astrotheme
12   82262   Astrology Weekly
13  134858   Moonology
14  142663   Future Point
15  148962   StarIQ
16  152624   ElsaElsa
17  153585   Michael Lutin
18  166246   Funkastrology
19  171597   Shelley Von Strunckel
20  182598   Skyscript
21  186859   Sasstrology
22  192885   Terry Nazon 
23  218935   Cosmic World
24  220934   Mystic Medusa
25  251852   Aquarius Papers
26  265693   Dr. Prem Kumar Sharma
27  266678   Planet Waves
28  273952   Bob Marks Astrologer
29  288240   Ed Tamplin
30  302470   Astro Dispatch