Armies

[Fingon]

Forces of the Free Peoples:

Gondor: 30,000 Men on foot
4,000 Men on horse
Leader: None

Rohan: 12,000 Men on horse
4,000 Men on foot (most with bow)
Leader: Belgaer

Fangorn: 200 Ents
8,000 Huorns
Leader: None

Mirkwood: 3,500 Elves on foot
Leader: None

Shire: 3,000 Hobbits on foot
100 Hobbits on pony
Leader: Fingon

Lindon: 2,000 Elves on foot
400 Elves on horse
Leader: Fingon

Lothlorien: 2,000 Elves on foot
Leader: None

Beornings: 1,000 Men on foot
200 Men on horse
Leader: None

Erebor: 750 Dwarves on foot
Leader: None

Dale: 500 Men on foot
100 Men on horse
Leader: None

Bree: 400 Men on foot
40 Men on horse
150 Hobbits on foot
Leader: None

Imladris: 100 Elves on foot
20 Elves on horse
Leader: Fingon

Others: 100 Eagles
Leader: None

Total: 72,560

Forces of Evil:

Mordor: 80,000 Orcs on foot
1,000 Orcs on warg
200 Trolls
Leader: Goba

Moria: 10,000 Goblins on foot
110 Trolls
Leader: None

Khand: 3,000 Men on foot
1,000 Men on horse
200 Chariots
Leader: None

Dol Guldur: 1,000 Orcs on foot
100 Orcs on warg
200 Spiders
20 Trolls
Leader: None

Rhun: 2,000 Men on foot
600 Men on horse
Leader: None

Harad: 1,000 Men on foot
300 Men on horse
Leader: Son of War

Umbar: 500 Men on foot
80 Men on horse
Leader: None

Total: 101,310

Note: These numbers do not include ships and sailors.
Evil does have a seemingly small number, but that's because they lost the last war they were in.

Others:

Northern Bellakar: 8,000 Footsoldiers
5,000 Horsemen
Leader: None

Southern Bellakar: 11,000 Footsoldiers
7,000 Horsemen
Leader: None

Sultanate of Raj: 13,000 Footsoldiers
9,000 Horsemen
Leader: None

Clan Territories: 7,000 Footsoldiers
10,000 Horsemen
Leader: None

[Fingon]

*Update including Far South*