| Natural Change | 773 |
| equals Births | 1,602 |
| less Deaths | 829 |
| Net Migration | -1,091 |
| equals net International Migration | 84 |
| plus net Domestic Migration | -1,175 |
| Table 1. Population | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Chg 10-15 | %Chg 10-15 |
| Willacy County, TX | 48489 | P0000001 | 22,201 | 22,119 | 22,120 | 21,953 | 21,917 | 21,903 | -298 | -1.34 |
| Table 2. Births | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Sum11-15 | |
| Willacy County, TX | 48489 | B0000001 | 344 | 341 | 312 | 308 | 323 | 318 | 1,602 | |
| Table 3. Deaths | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Sum11-15 | |
| Willacy County, TX | 48489 | D0000001 | 72 | 163 | 161 | 149 | 187 | 169 | 829 | |
| Table 4. Natural Change | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Sum11-15 | |
| Willacy County, TX | 48489 | NC000001 | 272 | 178 | 151 | 159 | 136 | 149 | 773 | |
| Table 5. International Migration | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Sum11-15 | |
| Willacy County, TX | 48489 | MI000001 | 4 | 18 | 9 | 12 | 21 | 24 | 84 | |
| Table 6. Domestic Migration | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Sum11-15 | |
| Willacy County, TX | 48489 | MD000001 | 8 | -284 | -159 | -332 | -193 | -207 | -1,175 | |
| Table 7. Net Migration | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Sum11-15 | |
| Willacy County, TX | 48489 | MN000001 | 12 | -266 | -150 | -320 | -172 | -183 | -1,091 | |
| Table 8. Group Quarters | ||||||||||
| Area Name | GeoID | Item | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Chg10-15 | %Chg 10-15 |
| Willacy County, TX | 48489 | GQ000001 | 3,277 | 3,276 | 3,286 | 3,297 | 3,289 | 3,290 | 13 | 0.40 |