ZIP 78666 vs ZIP 78665

Side-by-side comparison of 78666 (San Marcos, Texas) and 78665 (Round Rock, Texas).

78666 (San Marcos, Texas)78665 (Round Rock, Texas)

Population & Housing

Population

42,048

25,495

Homeowners

24,797

21,602

Age Distribution

19-24

1,582

704

25-34

7,079

3,532

35-44

7,183

12,325

45-54

13,130

3,316

55-64

3,462

1,527

65-74

2,025

594

75+

1,635

320

Income Distribution

Under $15K

5,298

219

$15K-$25K

4,461

460

$25K-$50K

12,326

4,938

$50K-$75K

9,036

8,886

$75K-$100K

3,406

4,755

$100K+

3,447

4,029

Explore These ZIP Codes

ZIP 78666 Details ZIP 78665 Details