The name Micah is a girl's name of Hebrew origin meaning "who is like the Lord". Micah is ranked #982 on our popularity charts and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
Long a traditional boys’ name, now increasingly used for their sisters, as an alternative to the overused Michaela. A synonym is the German Meike, a version of Mary. Perhaps surprisingly, Micah has been on the US Top 1000 for girls since 1981, though it's in danger of dropping off.