Is Lois a male or female name?
Lois is used as both a female and male name. In counted records, it is associated with female usage in United States at 99% and male usage in Spain at 100%. Country context changes the answer.
Result without a country hint
This is the response used when the request does not supply a country. It is a fallback, not a claim that every country has the same distribution.
- Association
- female
- Probability
- 99%
- Sample size
- 350,081
- Confidence
- high
Lois by country
Only sources that publish observation counts appear in this table. The probability is the dominant-gender share within that country source; sample sizes from different countries cover different years and should not be treated as population rankings.
| Country | Association | Probability | Sample | Source |
|---|---|---|---|---|
| United States US | female | 99% | 335,464 | ssa |
| England and Wales GB | female | 100% | 11,338 | ons |
| Spain ES | male | 100% | 1,523 | ine |
| France FR | male | 69% | 685 | insee |
| Switzerland CH | male | 63% | 462 | bfs |
| Canada CA | female | 98% | 388 | statcan |
| Austria AT | female | 74% | 118 | statat |
| Ireland IE | female | 100% | 86 | cso |
Attested in 15 countries and territories
Presence means the name appears in a source for that country. Sources without counts cannot support a popularity share.
AT · AU · BE · CA · CH · DE · ES · FR · GB · IE · IN · NZ · PL · SE · US
Lois over time
In the United States, 100% of the babies named Lois in the 1880s were girls, against 99% in the 2020s. In France, 31% of the babies named Lois in the 2010s were girls.
| Decade of birth | United States: girls | Babies | France: girls | Babies |
|---|---|---|---|---|
| 1880s | 100% | 954 | — | |
| 1890s | 99% | 3,262 | — | |
| 1900s | 98% | 7,805 | — | |
| 1910s | 99% | 38,677 | — | |
| 1920s | 99% | 88,828 | — | |
| 1930s | 99% | 81,349 | — | |
| 1940s | 100% | 57,142 | — | |
| 1950s | 100% | 36,347 | — | |
| 1960s | 99% | 13,347 | — | |
| 1970s | 98% | 2,938 | — | |
| 1980s | 97% | 1,439 | — | |
| 1990s | 98% | 949 | — | |
| 2000s | 98% | 799 | — | |
| 2010s | 100% | 1,022 | 31% | 645 |
| 2020s | 99% | 606 | — |
Births per decade from the US Social Security Administration (1880–2024) and INSEE (France, 1900–2025); decades with fewer than 100 babies are left out. See boys' names that became girls' names and French names that changed sex.
Look up Lois with a country
Send a reliable two-letter country code when you have one. Preserve probability, sample size, confidence and source with the category.
curl "https://namegender.com/api/v1/gender?name=Lois&country=US" \
-H "Authorization: Bearer ng_live_xxxxxxxxxxxx"Copy failed. Select and copy the text.
Method and limits
Counted rows come from national registration sources that publish male and female totals. The attested-country list also includes sources that confirm presence but do not publish a sample size. Those two evidence types are kept separate.
Name data describes a population-level association. It does not identify an individual person's gender. Preserve unknown and low-confidence results, and do not use name inference for employment, medical, financial, insurance, legal or eligibility decisions.
Data version: 2026.10. Read the benchmark methodology and database provenance before applying a threshold.
Questions about Lois
Is Lois a male or female name?
Lois is used as both a female and male name. In counted records, it is associated with female usage in United States at 99% and male usage in Spain at 100%. Country context changes the answer.
Why can the result for Lois change by country?
A name can have different observed distributions in different populations. A country hint narrows the evidence used by the API instead of treating one global result as universal.
Does the name Lois identify a person's gender?
No. This page describes statistical associations in name records. It cannot identify an individual person and should not be used for consequential decisions.