# Monaghan (surname)

Source: https://namelineage.com/surname/monaghan/  
Publisher: Name Lineage. Counts from the US Census Bureau; origin and etymology from Wiktionary; bearers from Wikidata. Data updated 2026-11-11.

An Irish surname.

| Field | Value |
|---|---|
| Origin | Irish |
| Type | not recorded |
| People in the US (2010 Census) | 7,968 |
| US rank (2010) | 4,452 of 162,253 |
| How often | about 1 in every 38,748 people |
| Change since 2000 | +4.7% (7,613 in 2000) |
| Pronunciation | /ˈmʌnəhən/, 3 syllables |
| Variant spellings | none recorded |

## Etymology

Borrowed from Irish Muineachán. The surname derives from an anglicization of Irish Ó Manacháin.

## Who carries it

Share of people named Monaghan in the 2010 US Census by the Census's own race and ethnicity groups. The Census suppresses a share when the count behind it is small.

| Group | Share |
|---|---|
| White (not Hispanic) | 96% |
| Black (not Hispanic) | 0.3% |
| Hispanic or Latino (any race) | 1.6% |
| Asian and Pacific Islander | 0.6% |
| American Indian and Alaska Native | 0.7% |
| Two or more races | 1.0% |

## Where

Wikidata records people named Monaghan in the United States.

## People named Monaghan

- Michelle Monaghan, American actress (born 1976)
- Cameron Monaghan, American actor and model
- Tom Monaghan, American entrepreneur who founded Domino's Pizza in 1960
- Marjorie Monaghan, American actress
- Paige Cronin, American soccer player

## Similar surnames

Mangan, Mangano, Mangham, Mongeon, Munson, Mancini, Monson, Manzano, Mangum, Manson, Manzanares, Monzon.

## How to read these numbers

A Census count is people alive and counted in 2010, not births, and names occurring fewer than 100 times are not published at all. Ethnicity shares are the Census's own categories.