Last official estimated population of Contra Costa County was 1,052,894 (year 2014)[1]. This was 0.33% of total US population and 2.7% of total California state population. Area of Contra Costa County is 803.8 mi² (=2081.8 km²), in this year population density was 1,309.95 p/mi². If population growth rate would be same as in period 2010-2014 (+0.09%/yr), Contra Costa County population in 2024 would be 1,062,629 [0].
Historical population of Contra Costa County for period 1860-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1860-1870] +4.73 %/yr
[1870-1880] +4 %/yr
[1880-1890] +0.76 %/yr
[1890-1900] +2.93 %/yr
[1900-1910] +5.79 %/yr
[1910-1920] +5.46 %/yr
[1920-1930] +3.85 %/yr
[1930-1940] +2.48 %/yr
[1940-1950] +11.52 %/yr
[1950-1960] +3.18 %/yr
[1960-1970] +3.16 %/yr
[1970-1980] +1.63 %/yr
[1980-1990] +2.05 %/yr
[1990-2000] +1.67 %/yr
[2000-2005] +1.04 %/yr
[2005-2010] +0.98 %/yr
[2010-2014] +0.09 %/yr
Looking for settlements in Contra Costa County? Visit this page: Settlements in Contra Costa County, CA
Population of Contra Costa County by age groups male (M) and female (F)[1b]
Age Gr. | (M) | (F) | Total |
0 to 4 | 32727 | 31874 | 64,601 |
5 to 9 | 37533 | 35893 | 73,426 |
10 to 14 | 38924 | 37548 | 76,472 |
15 to 19 | 37273 | 35166 | 72,439 |
20 to 24 | 35087 | 33959 | 69,046 |
25 to 29 | 33985 | 33407 | 67,392 |
30 to 34 | 35499 | 36722 | 72,221 |
35 to 39 | 34647 | 37005 | 71,652 |
40 to 44 | 37925 | 39640 | 77,565 |
45 to 49 | 39509 | 41443 | 80,952 |
50 to 54 | 41379 | 43384 | 84,763 |
55 to 59 | 37318 | 39797 | 77,115 |
60 to 64 | 30897 | 34599 | 65,496 |
65 to 69 | 25058 | 29166 | 54,224 |
70 to 74 | 17064 | 20486 | 37,550 |
75 to 79 | 11574 | 14311 | 25,885 |
80 to 84 | 7844 | 10948 | 18,792 |
85+ | 7462 | 14286 | 21,748 |
Contra Costa County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
Race | Male | Female | Total |
NH | 401459 | 430321 | 831,780 |
WAC | 394222 | 403770 | 797,992 |
WA | 369772 | 378633 | 748,405 |
NHWAC | 266950 | 277534 | 544,484 |
NHWA | 248577 | 258554 | 507,131 |
H | 140246 | 139313 | 279,559 |
HWAC | 127272 | 126236 | 253,508 |
HWA | 121195 | 120079 | 241,274 |
AAC | 102123 | 113448 | 215,571 |
NHAAC | 95747 | 107040 | 202,787 |
AA | 85549 | 96613 | 182,162 |
NHAA | 82199 | 93279 | 175,478 |
BAC | 58229 | 65846 | 124,075 |
NHBAC | 52067 | 59214 | 111,281 |
BA | 49762 | 56839 | 106,601 |
NHBA | 45629 | 52312 | 97,941 |
TOM | 27836 | 28739 | 56,575 |
NHTOM | 21080 | 21867 | 42,947 |
IAC | 12161 | 12365 | 24,526 |
HTOM | 6756 | 6872 | 13,628 |
HIAC | 6853 | 6591 | 13,444 |
HBAC | 6162 | 6632 | 12,794 |
HAAC | 6376 | 6408 | 12,784 |
NAC | 6049 | 6475 | 12,524 |
NHIAC | 5308 | 5774 | 11,082 |
IA | 5639 | 5394 | 11,033 |
NHNAC | 4631 | 5049 | 9,680 |
HBA | 4133 | 4527 | 8,660 |
HIA | 4070 | 3782 | 7,852 |
HAA | 3350 | 3334 | 6,684 |
NA | 3147 | 3416 | 6,563 |
NHNA | 2405 | 2697 | 5,102 |
NHIA | 1569 | 1612 | 3,181 |
HNAC | 1418 | 1426 | 2,844 |
HNA | 742 | 719 | 1,461 |
• Santa Clara County population
50.3 mi, 163°
• Alameda County
18.9 mi, 173°
• Sacramento County
49.4 mi, 42°
• San Mateo County
41.8 mi, 213°
• San Joaquin County
37 mi, 88°
• Stanislaus County
57.4 mi, 115°
• Solano County
24 mi, 1°
• Marin County
44.2 mi, 281°
• Yolo County
52.6 mi, 2°
• Napa County
45.4 mi, 333°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
See note 1 California Notes
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