Sumiko
Sumiko is a female given name: 99% of people named Sumiko are women, and it is recorded as female in 2 of the 2 countries covered.
- Verdict
- Female
- Male / female split
- 1% male / 99% female
- Confidence
- Medium (8 to 63 weighted country observations)
- Most common in
- Japan, United States
- US births since 1880
- 0 male / 618 female
- Data
- nam_dict (GFDL) + US SSA
- Updated
- 2026-09-11
How to address Sumiko
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Sumiko," in English, "Guten Tag Sumiko," in German. Sumiko is a female given name: about 99% of people named Sumiko are women. A quick look at a profile confirms it for certain.
Ready-made greetings in six languages
English
Dear Sumiko,
German
Guten Tag Sumiko,
French
Bonjour Sumiko,
Spanish
Estimado/a Sumiko:
Chinese
Sumiko您好：
Japanese
Sumiko様
English
Hi Sumiko,
German
Hi Sumiko,
French
Salut Sumiko,
Spanish
Hola Sumiko,
Chinese
Sumiko你好：
Japanese
Sumikoさん
This is a statistical estimate, not a statement about the gender, identity or correct form of address of any particular person.
Country breakdown
| Country | How common | Usually | Male share |
|---|---|---|---|
| Japan | uncommon | woman's name | 2% |
| United States | uncommon | woman's name | 0% |
United States birth data
0 male · 618 female · 618 births recorded
Since 1980: 0% male.
Frequently asked questions
Is Sumiko a male or female name?
Sumiko is a female given name: 99% of people named Sumiko are women, and it is recorded as female in 2 of the 2 countries covered.
How do I address Sumiko in an email?
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Sumiko," in English, "Guten Tag Sumiko," in German. Sumiko is a female given name: about 99% of people named Sumiko are women. A quick look at a profile confirms it for certain.
Is Sumiko a unisex name?
Sumiko is not a unisex name: 1% of people named Sumiko are men. Sumiko leans strongly female overall.
Related names
Sources
Gender by country: nam_dict, the c't first-names dictionary by Joerg Michael, roughly 44,000 names across 55 countries, licensed GFDL. US frequencies: United States Social Security Administration baby-name data, public domain. Method: how we classify names. Full dataset: data & licences. Data built 2026-09-11.
DearWho, "Is Sumiko a male or female name?", https://dearwho.vercel.app/name/sumiko (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_sumiko,
title = {Is Sumiko a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://dearwho.vercel.app/name/sumiko},
note = {Data: nam_dict (GFDL), US SSA public domain}
}