Counties in California by net international migration rate, July to June

Santa Clara County had the highest net international migration rate, July to June of 58 counties in 2018, at 6.85 per 1,000 inhabitants. Colusa County had the lowest, at -2.14 per 1,000 inhabitants. The median was 0.27 per 1,000 inhabitants and the figure for California was 1.74 per 1,000 inhabitants. Source: the U.S. Census Bureau.

Highest6.85Santa Clara County

Lowest-2.14Colusa County

Median0.2758 counties

California1.74History

All counties, 2018

per 1,000 inhabitants. Source: U.S. Census Bureau, Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2018 per 1,000 inhabitants	Change on 2017
1	Santa Clara County Estimated	6.85	-2.46 pts
2	Alameda County Estimated	5.02	-1.81 pts
3	San Francisco County Estimated	4.74	-1.64 pts
4	San Mateo County Estimated	4.28	-1.52 pts
5	Mono County Estimated	3.97	-1.42 pts
6	Yolo County Estimated	3.94	-1.58 pts
7	Contra Costa County Estimated	2.73	-1.04 pts
8	Sacramento County Estimated	2.2	-0.99 pts
9	Marin County Estimated	2	-0.66 pts
10	Los Angeles County Estimated	1.94	-1.08 pts
11	Orange County Estimated	1.88	-1.13 pts
12	San Diego County Estimated	1.4	-1.38 pts
13	San Joaquin County Estimated	1.06	-0.93 pts
14	Shasta County Estimated	1.05	-0.25 pts
15	Santa Barbara County Estimated	0.93	-1.09 pts
16	Alpine County Estimated	0.91	-0.93 pts
17	Sutter County Estimated	0.82	-1.14 pts
18	Del Norte County Estimated	0.8	-0.44 pts
19	Solano County Estimated	0.6	-0.74 pts
20	El Dorado County Estimated	0.54	-0.32 pts
21	Mariposa County Estimated	0.52	-0.34 pts
22	Fresno County Estimated	0.51	-0.75 pts
23	Inyo County Estimated	0.45	-0.06 pts
24	Amador County Estimated	0.44	-0.27 pts
25	Placer County Estimated	0.41	-0.49 pts
26	Butte County Estimated	0.39	-0.34 pts
27	Tuolumne County Estimated	0.3	-0.11 pts
28	Stanislaus County Estimated	0.29	-0.67 pts
29	Santa Cruz County Estimated	0.27	-0.56 pts
30	Lassen County Estimated	0.26	-0.03 pts
31	Humboldt County Estimated	0.26	-0.18 pts
32	Sonoma County Estimated	0.17	-0.56 pts
33	Napa County Estimated	0.17	-0.53 pts
34	Plumas County Estimated	0.16	-0.16 pts
35	Trinity County Estimated	0.16	+0.08 pts
36	Siskiyou County Estimated	0.14	-0.12 pts
37	Calaveras County Estimated	0.13	-0.13 pts
38	Nevada County Estimated	0.06	-0.1 pts
39	San Bernardino County Estimated	-0.01	-0.58 pts
40	Riverside County Estimated	-0.03	-0.56 pts
41	San Luis Obispo County Estimated	-0.13	-0.31 pts
42	Mendocino County Estimated	-0.15	-0.4 pts
43	Kern County Estimated	-0.16	-0.69 pts
44	Ventura County Estimated	-0.21	-0.72 pts
45	Imperial County Estimated	-0.21	-1.36 pts
46	Sierra County Estimated	-0.34	0 pts
47	Yuba County Estimated	-0.35	-0.69 pts
48	Lake County Estimated	-0.44	-0.26 pts
49	Modoc County Estimated	-0.45	-0.34 pts
50	Monterey County Estimated	-0.58	-1.22 pts
51	Tehama County Estimated	-0.6	-0.16 pts
52	Tulare County Estimated	-0.6	-0.65 pts
53	Merced County Estimated	-0.74	-0.7 pts
54	San Benito County Estimated	-1	-0.3 pts
55	Kings County Estimated	-1.05	-1 pts
56	Glenn County Estimated	-1.08	-0.21 pts
57	Madera County Estimated	-1.32	-0.36 pts
58	Colusa County Estimated	-2.14	-0.84 pts

Other periods

About this ranking

Net international migration from July 1 of the previous year through June 30 of the reported year per 1,000 residents, using the average of the population estimates at the two July 1 endpoints.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in California by net international migration rate, July to June, 2018) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in California by net international migration rate, July to June, 2018. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/net-international-migration-rate-july-june/california-counties?period=2018. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in California by net international migration rate, July to June, 2018. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/net-international-migration-rate-july-june/california-counties?period=2018.

Harvard

U.S. Census Bureau (2026) Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in California by net international migration rate, July to June, 2018 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/net-international-migration-rate-july-june/california-counties?period=2018 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_california_by_2018,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in California by net international migration rate, July to June, 2018}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/net-international-migration-rate-july-june/california-counties?period=2018. Publisher attribution: U.S. Census Bureau. Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in California by net international migration rate, July to June, 2018
PY  - 2026
DA  - 2026/03/26
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/net-international-migration-rate-july-june/california-counties?period=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/net-international-migration-rate-july-june/california-counties?period=2018.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest net international migration rate, July to June?

Santa Clara County, with 6.85 per 1,000 inhabitants in 2018, according to the U.S. Census Bureau.

Which county has the lowest net international migration rate, July to June?

Colusa County, with -2.14 per 1,000 inhabitants in 2018.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program: net international migration rate per 1,000 residents, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.