--- title: Registered births by age of father and nuptiality, Australia, 1975 onwards resource: https://publicdata.au/d/au-births-by-age-of-father/ publisher: Australian Bureau of Statistics licence: CC BY 4.0 licence_url: https://creativecommons.org/licenses/by/4.0/ version: 2026-10-03 rows: 7050 fields: 6 source: https://data.api.abs.gov.au/rest/data/ABS,BIRTHS_AGE_FATHER,1.0.0/all?format=csvfilewithlabels source_sha256: b2c651bd30255a1d0227d157a09d8c607122755854d39308605fef1ad9a39a5a language: en-AU operator: National Digital not_endorsed: true --- # Registered births by age of father and nuptiality, Australia, 1975 onwards Births registered in Australia each year since 1975 by single year of the father's age and by whether the parents were married, from the ABS. Updated yearly. Published by Australian Bureau of Statistics under CC BY 4.0 and republished here in other formats, with cells typed and suppressed values made null. Australian Bureau of Statistics has not endorsed this site. Also called: Average age of fathers Australia, Births to older fathers by year, Registered births by age of father ABS, Nuptial and ex-nuptial births by age of father. ## Download Latest version, redirects to `https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/`: - csv: https://publicdata.au/d/au-births-by-age-of-father/latest/data.csv (304 KB) - xlsx: https://publicdata.au/d/au-births-by-age-of-father/latest/data.xlsx (179 KB) - json: https://publicdata.au/d/au-births-by-age-of-father/latest/data.json (849 KB) - parquet: https://publicdata.au/d/au-births-by-age-of-father/latest/data.parquet (26 KB) - sqlite: https://publicdata.au/d/au-births-by-age-of-father/latest/data.sqlite (410 KB) - duckdb: https://publicdata.au/d/au-births-by-age-of-father/latest/data.duckdb (300 KB) - ndjson: https://publicdata.au/d/au-births-by-age-of-father/latest/data.ndjson (842 KB) - arrow: https://publicdata.au/d/au-births-by-age-of-father/latest/data.arrow (92 KB) - csv.gz: https://publicdata.au/d/au-births-by-age-of-father/latest/data.csv.gz (39 KB) Pinned version 2026-10-03: `https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/data.`. Dated versions never change. ## Query The query API returns only the rows you ask for, as JSON, NDJSON or CSV, from the same typed rows as the files. It needs no key. Rows: https://publicdata.au/api/v1/datasets/au-births-by-age-of-father/rows. Counts and sums: https://publicdata.au/api/v1/datasets/au-births-by-age-of-father/aggregate. - Rows: https://publicdata.au/api/v1/datasets/au-births-by-age-of-father/rows?year=eq.2024&nuptiality_code=eq.TOT&age_code=neq.TOT&limit=5 - Aggregate: https://publicdata.au/api/v1/datasets/au-births-by-age-of-father/aggregate?group=age_of_father&metric=sum.births&year=eq.2024&nuptiality_code=eq.TOT&age_code=neq.TOT Each filter is `field=operator.value` in the query string, and every filter must match. A number or date field compares as a number or date, and a text field compares as text. Values are case-sensitive except with `ilike`. Prefix `not.` to negate a filter, as `not.eq.value`. Operators: `eq.value`, `neq.value`, `gt.value`, `gte.value`, `lt.value`, `lte.value`, `like.*text*`, `ilike.*text*`, `in.(a,b,c)`, `is.null`. - `select`: Fields to return, comma-separated. Every field when absent. - `order`: `field.asc` or `field.desc`, comma-separated. The publisher's row order when absent. - `limit`: Rows per page, 1 to 10,000. 100 when absent. - `offset`: Rows to skip. The `next` URL in each answer sets it for you. - `group`: On `aggregate`, fields to group by, comma-separated. - `metric`: On `aggregate`, `count`, `sum.field`, `avg.field`, `min.field` or `max.field`, comma-separated. `count` when absent. - `format`: `json`, `ndjson` or `csv`. JSON carries the provenance header, and the others carry it in response headers. Without a version the API answers from the newest loaded version, and that answer changes when the publisher releases again. Put `versions//` before `rows` or `aggregate` for an answer that never changes. `/api/v1/datasets//versions` lists the loaded versions. The API allows 60 requests in 10 seconds from one address. Above that it answers 429 for 10 seconds with a `Retry-After` header, a `RateLimit-Policy` header and a JSON body that gives the limit. Every API answer carries the same `RateLimit-Policy`. A client should wait the `Retry-After` seconds, or read the files, which have no limit. OpenAPI for this dataset: https://publicdata.au/d/au-births-by-age-of-father/openapi.json ## Explore Charts and dashboards in the browser: https://publicdata.au/d/au-births-by-age-of-father/explore/. A dashboard can be shared as a link or embedded. ## Fields | field | type | publisher's header | note | |---|---|---|---| | `year` | integer | TIME_PERIOD | | | `nuptiality_code` | string | NUPT | | | `nuptiality` | string | Nuptiality | | | `age_code` | string | AGE | | | `age_of_father` | string | Age | | | `births` | integer | OBS_VALUE | | Key: `year, nuptiality_code, age_code`. ## Versions - 2026-10-03: 7050 rows, 6 fields, sha256 b2c651bd3025. https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/ Machine-readable: https://publicdata.au/d/au-births-by-age-of-father/versions.json, https://publicdata.au/d/au-births-by-age-of-father/changes.json, https://publicdata.au/d/au-births-by-age-of-father/datapackage.json, https://publicdata.au/d/au-births-by-age-of-father/schema.json, https://publicdata.au/d/au-births-by-age-of-father/history.tar.zst ## Part of ABS registered births - [Registered births by age of mother and nuptiality, Australia, 1975 onwards](https://publicdata.au/d/au-births-by-age-of-mother/) - [Registered births, birth rate and sex ratio by state, Australia, 1975 onwards](https://publicdata.au/d/au-births-by-state/) ## Same subject, other publishers - [Top three names registered for girls by council area, New South Wales](https://publicdata.au/d/nsw-top-baby-names-by-lga-female/) (NSW) - [Top three names registered for boys by council area, New South Wales](https://publicdata.au/d/nsw-top-baby-names-by-lga-male/) (NSW) - [Births, deaths and marriages registered each month, New South Wales](https://publicdata.au/d/nsw-bdm-registrations-monthly/) (NSW) - [Registered deaths by method of disposal each month, New South Wales](https://publicdata.au/d/nsw-bdm-disposal-methods-monthly/) (NSW) - [Births registered by mother's postcode, Queensland, latest year](https://publicdata.au/d/qld-births-by-mothers-postcode/) (Qld) - [Births registered by month, Queensland, latest year](https://publicdata.au/d/qld-births-by-month/) (Qld) - [Registrable life events by financial year, Victoria](https://publicdata.au/d/vic-registered-events-by-financial-year/) (Vic) - [Deaths registered per month, Victoria](https://publicdata.au/d/vic-deaths-registered-by-month/) (Vic) - [Marriages registered per month, Victoria](https://publicdata.au/d/vic-marriages-registered-by-month/) (Vic) - [Births, deaths and marriages registered by calendar year, Victoria](https://publicdata.au/d/vic-registered-events-by-calendar-year/) (Vic) - [Birth, death and marriage registrations by month, ACT](https://publicdata.au/d/act-bdm-registrations/) (ACT) - [Popular baby names by year and sex, New South Wales](https://publicdata.au/d/nsw-popular-baby-names/) (NSW) ## Attribution and citation Australian Bureau of Statistics, Registered births, nuptiality by age of father, 1975 onwards (BIRTHS_AGE_FATHER), ABS Data Explorer, sourced 3 October 2026, https://explore.data.abs.gov.au/vis?df[ds]=ABS_ABS_TOPICS&df[id]=BIRTHS_AGE_FATHER&df[ag]=ABS&df[vs]=1.0.0, licensed under CC BY 4.0. The licence requires the publisher's attribution. We ask that you also name publicdata.au and link to the version you used. Plain text: Australian Bureau of Statistics, Registered births, nuptiality by age of father, 1975 onwards (BIRTHS_AGE_FATHER), ABS Data Explorer, sourced 3 October 2026, https://explore.data.abs.gov.au/vis?df[ds]=ABS_ABS_TOPICS&df[id]=BIRTHS_AGE_FATHER&df[ag]=ABS&df[vs]=1.0.0, licensed under CC BY 4.0. Serialised and versioned by National Digital at publicdata.au, https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/ Harvard: Australian Bureau of Statistics (2026) Registered births by age of father and nuptiality, Australia, 1975 onwards, version 2026-10-03 [data set], CC BY 4.0, sourced 3 October 2026. Serialised and versioned by National Digital at publicdata.au. Available at: https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/ Markdown: Data: [ABS registered births](https://www.abs.gov.au/website-privacy-copyright-and-disclaimer), Australian Bureau of Statistics, [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), sourced 3 October 2026. Files: [publicdata.au](https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/) by [National Digital](https://nationaldigital.com.au/). ## Questions ### How do I download Registered births by age of father and nuptiality, Australia as a CSV file? Open https://publicdata.au/d/au-births-by-age-of-father/latest/data.csv. It redirects to the newest dated version, which is https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/data.csv today. The same path serves Excel, JSON, Parquet, SQLite, DuckDB, NDJSON, Arrow. A dated URL never changes, so use it when the file must stay the same. ### Can I open Registered births by age of father and nuptiality, Australia in Excel? Yes. https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/data.xlsx is a workbook with the 7,050 rows on a records sheet, the field list on a second sheet and the provenance on a third. The CSV also opens in Excel. https://publicdata.au/d/au-births-by-age-of-father/v/2026-10-03/data.csv.gz is the CSV at about a tenth of the size. ### What years does Registered births by age of father and nuptiality, Australia cover? The current version covers 1975 to 2024. Each release from ABS becomes a new dated version here, and earlier versions stay online. ### How often is Registered births by age of father and nuptiality, Australia updated? ABS releases it yearly. This site checks the portal every week and adds a dated version when the file changes. ### Can I use Registered births by age of father and nuptiality, Australia commercially? Yes. CC BY 4.0 allows commercial use, redistribution and derived works as long as the attribution is kept. The attribution string is in this page's side column and inside every file. ### Is this the official source for Registered births by age of father and nuptiality, Australia? No. The publisher is Australian Bureau of Statistics, and its page is https://www.abs.gov.au/website-privacy-copyright-and-disclaimer. This site republishes the publisher's file without changing its content. The original sits beside every version as source.csv with its SHA-256, so the two can be compared. ### What is in each row? The number of births registered in Australia in one calendar year to fathers of one age, for one nuptiality group. Ages run in single years from 15 and under, with the ABS's rows for the oldest ages, all ages and age not stated. ### What does nuptiality mean? A nuptial birth is one where the parents were married to each other when the birth was registered. An ex-nuptial birth appears here only when paternity was acknowledged, since the father's age is otherwise unknown. The Total group counts both as the ABS publishes it. ### Is the year the year of birth? It is the year the birth was registered. Most births are registered in the year they occur, and a late registration is counted in the year it was made. ## What this site did to the data Cells were typed, headers were renamed to snake_case and the encoding was made UTF-8. Rows were left alone. Nothing is derived. The publisher's file is beside every version as `source.csv`. ## Improve this dataset This page is built from [register/au-births-by-age-of-father.yaml](https://github.com/National-Digital/publicdata.au/blob/main/register/au-births-by-age-of-father.yaml) on GitHub, and a fix to it is welcome as a pull request. https://publicdata.au/contribute/ explains how.