Zac
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Meaning
a short form of Zachary
The formal names behind Zac
Zac is an established short form of this name.
Zachary · Hebrew origin · English form of Zacharias, from Hebrew Zechariah, "Yahweh remembers"
How popular is Zac around the world?
In the United States, 271 babies were named Zac between 2020 and 2025. In South Australia, 12 boys were registered as Zac in 2017.
Zac is on the official records of the United States, South Australia, Scotland, Ireland, New Zealand, England and Wales, Canada, France and Spain.
United States
1 in 80,000
In the United States, 271 babies were named Zac between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Zac peaked in the 2010s and the 2020s in nearly equal measure.
Births with a Social Security record. Source: U.S. Social Security Administration
South Australia
1 in 1,5002017
In South Australia, 12 boys were registered as Zac in 2017.
share of that year’s name registrations
Births registered in South Australia (not all of Australia) by first name and year of registration, 1944–2017, from the state’s Births, Deaths and Marriages registry, which publishes every name down to a single birth in capitals; a spelling its export repeats inside a year is counted once, and from 2018 only a top 100 is published, so the series ends at 2017. Source: Consumer and Business Services (South Australia), popular baby names
Scotland
1 in 1,800
In Scotland, 25 boys named Zac were registered in 2024, the 176th most common name among boys that year.
share of that year’s name registrations
Births registered in Scotland; different spellings count separately but accents are merged at source, and any spelling under 3 in total is suppressed. Source: National Records of Scotland, babies' first names
Ireland
1 in 2,600
In Ireland, 21 boys named Zac were born in 2025, the 223rd most common name among boys that year.
share of that year’s name registrations
Exact registered spellings from Irish vital statistics; any name under 3 in a year is withheld at source, and accented spellings (fadas) are recorded reliably only from 2018. Source: Central Statistics Office (Ireland), Irish babies' names
New Zealand
1 in 4,800
In New Zealand, 12 boys named Zac were registered in 2025.
share of that year’s name registrations
First given names from New Zealand birth registrations, grouped by registration year; any name under 10 in a year is excluded at source. Shares divide by Stats NZ’s count of births registered to mothers living in New Zealand, under 1% below the registry’s own count. Source: Department of Internal Affairs (New Zealand), baby name popularity over time
England and Wales
1 in 6,700
In England and Wales, 87 boys named Zac were born in 2025, the 444th most common name among boys that year.
share of that year’s name registrations
Birth registrations in England and Wales (not the whole UK); exact spellings are counted separately, and any spelling under 3 in a year is withheld at source. Source: Office for National Statistics, baby names in England and Wales
Canada
1 in 10,000
In Canada, 35 boys named Zac were born in 2024, the 756th most common name among boys that year.
share of that year’s name registrations
First given names from provincial and territorial vital statistics across Canada; any name-sex-year under 5 is excluded at source, and small Quebec counts carry a randomized adjustment made at source. Shares divide by Statistics Canada’s count of live births for the year; the 2024 count is preliminary. Source: Statistics Canada, first names at birth (table 17-10-0147-01)
France
1 in 43,000
In France, about 15 boys named Zac were born in 2025, ranked 2,051st among boys that year.
share of that year’s births on record
Births in France by year of birth, from INSEE’s fichier des prénoms (1900–2025; Mayotte from 2012); exact spellings count separately (Léo and Leo are different names), any spelling under 3 in a year and sex is withheld at source, every count is rounded to the nearest 5 at source, and nametree keeps the spellings that reached 20 in some year. Shares divide by INSEE’s count of births in France from 1957, and before that by the file’s own total for the year; INSEE says the file is not complete before 1946. Source: Insee, fichier des prénoms (last updated 2026-07-16)
Spain
1 in 1M
In Spain, 43 residents are named Zac, ranked 16,588th among men, with a mean age of 9.2 years.
Residents of Spain on 1 January 2025. Spain publishes how old a name’s living bearers are, not a birth series, so there is no year chart. Source: INE (Spain), Censo de Población anual, 1 January 2025
Argentina
last on record 2021
Zac is not on the 2024 record for Argentina, where small counts are withheld at source.
The count never rose above 4 in a year, too few to chart.
Given-name components of births in Argentina 2012–2024; national cells are lower bounds and no sex split is published. Source: RENAPER (Argentina), Dirección Nacional de Población, given names 2012-2024
Mexico City City
last on record 2021
Zac is not on the 2022 record for Mexico City, where small counts are withheld at source.
The count never rose above 2 in a year, too few to chart.
Civil-registry acts in Mexico City by registration year. Counts are lower bounds (names under 6 in a month and borough are removed at source) and count name-instances, not people; compound names are split, so “Maria Jose” counts under each part. 2023, a partial extract through 3 Mar with no cell on record for this name, is excluded. Source: Registro Civil of Mexico City, open data portal, registered given names 2000-2023
New South Wales
outside the top 100
Zac is not in the 2025 top 100 for New South Wales.
share of that year’s top-100 registrations
New South Wales (not all of Australia) publishes only each year’s 100 most popular names per sex, so a missing year means below that top 100, not rare. Source: NSW Registry of Births, Deaths and Marriages, popular baby names
Poland
last on record 2018
Zac is not on the 2025 record for Poland, where names given fewer than 2 times in a year are withheld at source.
The count never rose above 3 in a year, too few to chart.
First names given to children born in Poland by year of birth, 2000–2025, from the PESEL population register (Ministry of Digital Affairs); exact spellings count separately (Łukasz and Lukasz are different names), names given fewer than 5 times in a year were left off the list through 2012 and fewer than 2 times from 2013, and the register also counts children born abroad, so its yearly sums run above Poland’s live births. Shares divide by the register’s own published total for the year, never by births. Source: Ministry of Digital Affairs, PESEL register (dane.gov.pl)
Not on the record in Puerto Rico: that registry withholds small counts, so rare uses may sit below its floor.
Not on the Chile record: nametree keeps spellings that reached 5 registrations in some year, so rarer uses are not shown. Not on the Montevideo record for 1940 to 2011: that registry withholds nothing, so this spelling was not given there in those years. Not on the Austria record for 1984 to 2025: Statistik Austria publishes every first name down to a single birth, so this name was not given there in those years (before 2010 the record covers babies with Austrian citizenship only). Not on Norway’s list: Statistics Norway lists only first names carried by 200 or more living people, so rarer names are not shown.
When you meet Zac
Most people given the name Zac in the United States are children or teenagers today. The name belongs to this generation.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Zac deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Zac truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Zac fits with your family’s names and surname.
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