ZIP 78665 vs ZIP 78666

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

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

Population & Housing

Population

25,495

42,048

Homeowners

21,602

24,797

Age Distribution

19-24

704

1,582

25-34

3,532

7,079

35-44

12,325

7,183

45-54

3,316

13,130

55-64

1,527

3,462

65-74

594

2,025

75+

320

1,635

Income Distribution

Under $15K

219

5,298

$15K-$25K

460

4,461

$25K-$50K

4,938

12,326

$50K-$75K

8,886

9,036

$75K-$100K

4,755

3,406

$100K+

4,029

3,447

Explore These ZIP Codes

ZIP 78665 Details ZIP 78666 Details