as far as (one) knows

as far as (one) knows

As much as one knows about a certain situation at a particular time. As far as I know, Scott is coming today. Has anyone else heard from him? Thanksgiving dinner has been pushed to 4:00, as far as we know. But I can call Carol and try to get an update, if that makes you feel better.
See also: far, know
Farlex Dictionary of Idioms.

as far as anyone knows

 and so far as anyone knows; to the best of one's knowledge
to the limits of anyone's knowledge. (The anyone can be replaced with a more specific noun or pronoun.) As far as anyone knows, this is the last of the great herds of buffalo. Far as I know, this is the best spot to sit. Q: Are the trains on time? A: To the best of my knowledge, all the trains are on time today.
See also: anyone, far, know
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • as far as anyone knows
  • the dear only knows
  • Friendsgiving
  • (the) gods only know
  • the dear knows
  • gosh knows
  • goddess
  • goddess knows
  • goddess only knows