Compiled by the ENCLAI research team following a documented methodology · Editorial oversight: Dr Natalya Mathur, Founder · Data last updated: (UTC)

Mumps in Australia: 2026 cases and outbreak reports

Reported mumps surveillance for Australia (AUS) — ≈ Stable · 2025 — latest record 2026-11-06

What the 2026 data shows

As of 31 October 2026, Australia has reported 99 mumps cases in 2026, compiled from figures published by Australia NNDSS Fortnightly Report and 1 other reporting authority. The full year 2025 closed at 172 cases. The three-year baseline for Australia is 181 cases a year. 2025 closed 5% below 3yr avg (WHO historical series), which is why the trend reads “≈ Stable”.

Of the 20 countries reporting mumps to ENCLAI in 2026, Australia accounts for 0.4% of reported cases and ranks 10 by case count.

ENCLAI has logged 81 surveillance records for mumps in Australia in 2026, with the most detailed reporting in Mar 2026 (13 records). 9 of those arrived in the last 30 days; the case counts run to 2026-10-31. 3 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: Australia NNDSS Fortnightly Report — State/Territory Level · Australia NNDSS data visualisation tool — monthly notifications, national and state

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Surveillance summary

2026 cases (YTD)
99
2025 cases (full year)
172
Baseline avg (3yr)
181
Trend (2025)
≈ Stable · 2025
-5% vs 3yr avg

Reported cases by year, Australia

YearReported casesShare of worldwide reports
2023 not reported —
2024 not reported —
2025 172 0.3%
2026 (year to date) 99 0.4%

Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting mumps to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.

Surveillance records logged in 2026

MonthRecordsReporting sources
Jan 202681
Feb 202681
Mar 2026131
Apr 202631
May 202671
Jun 2026121
Jul 202671
Aug 202661
Sep 202682
Nov 202691

A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases. 9 records were logged in the last 30 days.

Sub-national reporting, 2026

Areas within Australia with the most mumps records this year:

AreaRecords
New South Wales19
Queensland15
Victoria8
South Australia7
Western Australia4

Mumps in other countries, 2026

Country2026 casesTrend
China 14,109
South Korea 5,424 ≈ Stable · 2025
Colombia 4,054 ▼ Declining · 2025
Spain 1,213 ≈ Stable · 2025
Poland 517 ▼ Declining · 2025

Other diseases reported in Australia, 2026

Disease2026 casesTrend
Seasonal influenza 269,750
Respiratory syncytial virus infection 138,359
COVID-19 86,718
Chlamydia infection 81,179
Gonococcal infection 38,898

Questions about this page

How many mumps cases has Australia reported in 2026?
As of 31 October 2026, Australia has reported 99 mumps cases in 2026, compiled from figures published by Australia NNDSS Fortnightly Report and 1 other reporting authority. The full year 2025 closed at 172 cases. The three-year baseline for Australia is 181 cases a year. 2025 closed 5% below 3yr avg (WHO historical series), which is why the trend reads “≈ Stable”.
Is mumps rising or falling in Australia?
ENCLAI's trend reading for mumps in Australia is “≈ Stable · 2025”: the latest complete year is compared with the earlier baseline from the reported counts; the current year is not judged until it closes.
Where does Australia publish mumps surveillance data?
The counts on this page were published by Australia NNDSS Fortnightly Report — State/Territory Level and Australia NNDSS data visualisation tool — monthly notifications, national and state. ENCLAI compiles and normalises them and is not affiliated with these authorities.

About this data

Figures are reported case counts as published by the originating health authorities, compiled by ENCLAI from 444 verified surveillance sources. Australia figures reflect the reporting available to ENCLAI; reporting periods and case definitions differ between sources, and a missing report does not establish zero cases. ENCLAI holds mumps records for Australia dated from 2025. How we verify and update data: methodology & Trust Center · understanding case counts.

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One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.

Double opt-in — we send a confirmation link and nothing else until you click it. One-click unsubscribe on every email. See our privacy notice.