Some interesting facts about Atascosa County today. I found them at this website:
http://quickfacts.census.gov/qfd/states/48/48013.html
The site compares Atascosa with Texas, but I didn't include those facts.

People QuickFacts -- Atascosa County
Population, 2008 estimate
43,877
Population, percent change, April 1, 2000 to July 1, 2008
13.6%
Population estimates base (April 1) 2000
38,623
Persons under 5 years old, percent, 2008
7.6%
Persons under 18 years old, percent, 2008
28.0%
Persons 65 years old and over, percent, 2008
11.7%
Female persons, percent, 2008
50.6%
White persons, percent, 2008 (a)
96.5%
Black persons, percent, 2008 (a)
1.3%
American Indian and Alaska Native persons, percent, 2008
0.9%
Asian persons, percent, 2008
0.6%
Native Hawaiian and Other Pacific Islander, percent, 2008
0.1%
Persons reporting two or more races, percent, 2008
0.7%
Persons of Hispanic or Latino origin, percent, 2008
60.5%
White persons not Hispanic, percent, 2008
37.2%
Living in same house in 1995 and 2000, pct 5 yrs old & over
60.9%
Foreign born persons, percent, 2000
5.1%
Language other than English spoken at home, pct age 5+, 2000
45.3%
High school graduates, percent of persons age 25+, 2000
65.2%
Bachelor's degree or higher, pct of persons age 25+, 2000
10.5%
Persons with a disability, age 5+, 2000
8,221
Housing units, 2007
15,797
Homeownership rate, 2000
78.4%
Housing units in multi-unit structures, percent, 2000
4.0%
Median value of owner-occupied housing units, 2000
$52,900
Households, 2000
12,816
Persons per household, 2000
2.99
Median household income, 2007
$40,186
Persons below poverty, percent, 2007
18.1%

Business QuickFacts - Atascosa County, Texas
Private nonfarm establishments with paid employees, 2006
639
Private nonfarm employment, 2006
6,598
Private nonfarm employment, percent change 2000-2006
11.5%
Nonemployer establishments, 2006
2,730
Total number of firms, 2002
2,755
Black-owned firms, percent, 2002
fewer than 100
American Indian and Alaska Native owned firms, percent, 2002
fewer than 100
Asian-owned firms, percent, 2002
fewer than 100
Native Hawaiian and Other Pacific Islander owned firms, percent, 2002
fewer than 100
Hispanic-owned firms, percent, 2002
29.7%
Retail sales per capita, 2002
$6,265

Geography QuickFacts - Atascosa County, Texas
Land area, 2000 (square miles)
1,232.12
Persons per square mile, 2000
31.4