Here are the 2009 population estimates for Austin and surrounding communities:

Travis County Population

Austin 749,861

Pflugerville 33,862

Lakeway 9,966

Lago Vista 6,358

West Lake Hills 3,169

The Hills 3,093

Manor 2,648

Jonestown 2,094

Rollingwood 1,312

Briarcliff 1,108

Mustang Ridge 964

Bee Cave 946

San Leanna 693

Sunset Valley 451

Creedmoor 268

Williamson County Population

Round Rock 93,551

Cedar Park 53,210

Georgetown 41,310

Leander 19,725

Taylor 15,428

Hutto 9,671

Liberty Hill 1,620

Granger 1,192

Florence 878

Thrall 668

Weir 520

Hays County Population

San Marcos 46,446

Kyle 20,779

Buda 3,460

Dripping Springs 1,772

Woodcreek 1,443

Mountain City 1,289

Uhland 1,246

Niederwald 667

Hays 276

Bear Creek 380

Bastrop County PopulationElgin 10,258

Bastrop 7,299

Camp Swift 5,598

Smithville 4,611

Caldwell County PopulationLockhart 13,531

Luling 5,399

Martindale 1,022

Source: Nielsen Claritas