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William Koo

We found 26 people named William Koo across 7 states. View phone numbers, addresses, and public records. Use the state filter to narrow results.

Geographic Distribution

Where people named William Koo live in the US

Koo Across the US

AK: No data AL: No data AR: No data AZ: No data California: 15 people CO: No data CT: No data DC: No data DE: No data FL: No data GA: No data HI: No data IA: No data ID: No data IL: No data IN: No data KS: No data KY: No data LA: No data MA: No data MD: No data ME: No data MI: No data MN: No data MO: No data MS: No data MT: No data NC: No data ND: No data NE: No data NH: No data NJ: No data NM: No data NV: No data New York: 3 people OH: No data Oklahoma: 2 people Oregon: 3 people PA: No data RI: No data SC: No data SD: No data TN: No data TX: No data UT: No data VA: No data VT: No data WA: No data WI: No data WV: No data WY: No data
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Highest Concentration

Per 100,000 residents

Demographics

Based on a sample of 26 people named William Koo

About William Koo

William Koo is a very rare name in the United States, with 26 people sharing this name. That's approximately 1 in every 12,846,154 Americans. The highest concentration is in California (58%), across 7 states total. The top city is Portland, OR with 3 people. The average age is 65 years old (median 62).

Age Distribution

35-44
6%
45-54
29%
55-64
18%
65+
47%
Age range: 44 – 90 years

Birth Decade

When people named William Koo were born

6%
30s
12%
40s
29%
50s
18%
60s
29%
70s
6%
80s

Most Common First Names

For people with last name Koo

Show 10 more names

Narrow Your Search

Browse by State

Top Cities

People Named William Koo

William H Koo
Buena Park, CA
(714) 670-7845
5422 Rockledge Dr, Buena Park, CA 90621, USA
6 phones 4 addresses Updated Sep 2025
William Koo
75 · Staten Island, NY
3852 Richmond Ave, Annadale, NY 10312, USA
Updated Sep 2025
William M Koo
North Charleston, SC
(843) 760-0220
7455 Cross County Rd, North Charleston, SC 29418, USA
1 phone Updated Sep 2025
William Koo
85 · Norman, OK
(405) 205-9887
1505 Oakhurst Ave, Norman, OK 73071, USA
4 phones 4 addresses Updated Sep 2025
William Koo
75 · West Hartford, CT
(860) 576-3271
123 Park Rd, West Hartford, CT 06119, USA
1 phone Updated Jan 2026
William S Koo
Norman, OK
(405) 329-6936
1505 Oakhurst Ave, Norman, OK 73071, USA
2 phones Updated Nov 2025
William Koo
62 · Madera, CA
(916) 221-2978
1250 San Sebastian Way, Madera, CA 93638, USA
1 phone Updated Sep 2025
William Koo
67 · Portland, OR
(503) 757-5119
2624 SW Hume Ct, Portland, OR 97219, USA
1 phone Updated Jan 2026
William H Koo
75 · Ukiah, CA
(707) 462-0822
214 Clara Ave, Ukiah, CA 95482, USA
1 phone 4 addresses Updated Sep 2025
William Koo
58 · San Francisco, CA
(415) 706-8865
2491 23rd Ave, SF, CA 94116, USA
6 phones 2 addresses Updated Oct 2025
William K Koo
50 · Irvine, CA
(714) 389-2310
46 Chula Vista, Irvine, CA 92602, USA
3 phones 6 addresses Updated Dec 2025
William H Koo
90 · Corona, CA
(650) 521-0118
6704 Rico Ct, Corona, CA 92880, USA
4 phones 11 addresses Updated Jan 2026
William P Koo
52 · Fremont, CA
(510) 449-4383
49024 Feather Grass Terrace, Fremont, CA 94539, USA
10 phones 9 addresses Updated Sep 2025
William Koo
Ukiah, CA
1450 S State St, Ukiah, CA 95482, USA
1 address Updated Sep 2025
William Koo
62 · Hayward, CA
353 Chambosse Dr, Hayward, CA 94544, USA
Updated Sep 2025
William W Koo
77 · Belmont, CA
(650) 906-8586
2473 Hallmark Dr, Belmont, CA 94002, USA
3 phones 2 addresses Updated Nov 2025
William Koo
Portland, OR
(602) 460-5192
6035 SE Reed College Pl, Portland, OR 97202, USA
1 phone Updated Aug 2025
William L Koo
Dublin, CA
(510) 888-9538
7099 Amador Plaza Rd, Dublin, CA 94568, USA
1 phone Updated Nov 2025
William Koo
54 · Fremont, CA
(510) 396-6355
38057 Logan Dr, Fremont, CA 94536, USA
7 phones 6 addresses Updated Dec 2025
William W Koo
Fremont, CA
(510) 659-8687
4556 Stevenson Blvd, Fremont, CA 94538, USA
1 phone Updated Sep 2025
William Y Koo
49 · Brooklyn, NY
(845) 255-6356
1419 78th St, Bensonhurst, NY 11228, USA
4 phones 6 addresses Updated Oct 2025
William H Koo
75 · Elk Grove, CA
(707) 880-5699
10042 Autumn Sage Way, Elk Grove, CA 95757, USA
1 phone Updated Aug 2025
William Koo
San Bruno, CA
(650) 303-1605
2033 Oakmont Dr, San Bruno, CA 94066, USA
1 phone Updated Aug 2025
William E Koo
50 · Sterling, VA
46565 Harry Byrd Hwy, Sterling, VA 20164, USA
Updated Sep 2025
Show more
William C Koo
Portland, OR
(503) 239-1885
2115 SE 60th Ave, Portland, OR 97215, USA
1 phone Updated Oct 2025
William J Koo
44 · Jericho, NY
(248) 755-1234
110 Maytime Dr, Jericho, NY 11753, USA
3 phones 1 address Updated Dec 2025

Can't find the right William Koo?

Frequently Asked Questions

Common questions about people named William Koo

How many people named William Koo are there in the US?

There are approximately 26 people named William Koo in the United States, found across 7 states.

Where do most people named William Koo live?

The highest concentration of people named William Koo is in California (58% of all William Koos). The top city is Portland, OR.

What is the average age of someone named William Koo?

Based on public records, the average age of people named William Koo is 65 years old.

How can I find a specific person named William Koo?

You can narrow your search by selecting a state or city from the filters above. Each profile includes phone numbers, addresses, and other public records to help you identify the right person.

Is the information about William Koo accurate?

Our data is compiled from publicly available records and is regularly updated. However, we recommend verifying any information independently. If you find an error, please use the report feature on the individual profile page.

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