Boulder County, Colorado
Demographics
As of the census of 2000, there were 271,651 people, 114,680 households, and 68,808 families residing in the county. The population density was 392 people per square mile (151/km²).

Boulder County, Colorado

Section Title: Demographics
Table Section Text: As of the census of 2000, there were 271,651 people, 114,680 households, and 68,808 families residing in the county. The population density was 392 people per square mile (151/km²).

Historical population

Census	Pop.	%±

1870	1,939	—

1880	9,723	401.4%

1890	14,082	44.8%

1900	21,544	53.0%

1910	30,330	40.8%

1920	31,861	5.0%

1930	32,456	1.9%

1940	37,438	15.4%

1950	48,296	29.0%

1960	74,254	53.7%

1970	131,889	77.6%

1980	189,625	43.8%

1990	226,374	19.4%

2000	271,651	20.0%

2010	294,567	8.4%

Est. 2018	326,078	10.7%

U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2015

Sentence(s)

As of the 2010 census, the population was 294,567.

final_sentence: As of the 2010 census, the population was 294,567.