Australasia:
- Australia
- New Guinea
- Solomon Islands
Asia:
- India
- Sri Lanka
- Southeast Asia
Africa:
- Madagascar
- Sub-Saharan Africa
Central and South America:
- Mexico
- Central America
- South America
North America:
- United States (introduced populations in some areas)
Parakeets inhabit various habitats within these regions, including rainforests, woodlands, grasslands, savannas, and coastal regions. They are arboreal birds that spend most of their time in trees.