Ranger Favorite Enemy and Half Races

[Driver 325 yards]

Do Half races count as human for the purpose of the Ranger Favorite Enemy Ability.

[Bronnwynn]

PRD - Half-Elf wrote:

Elf Blood: Half-elves count as both elves and humans for any effect related to race.

PRD - Ranger wrote:

Favored Enemy (Ex): At 1st level, a ranger selects a creature type from the ranger favored enemies table. He gains a +2 bonus on Bluff, Knowledge, Perception, Sense Motive, and Survival checks against creatures of his selected type. Likewise, he gets a +2 bonus on weapon attack and damage rolls against them. A ranger may make Knowledge skill checks untrained when attempting to identify these creatures.

Emphasis mine.

Yes, they do. They essentially gain the Humanoid (Human), Humanoid (Orc/Elf), and Humanoid (Half-Orc/Half-Elf) subtypes.

[Nefreet]

To add to what Bronnwynn said, lots of people believe the Planetouched races to be "half-human", but they're actually their own category (Outsider - Native).

Just in case you were wondering.