Portlaw
| Historical population | ||
|---|---|---|
| Year | Pop. | ±% |
| 1813 | 292 | — |
| 1821 | 395 | +35.3% |
| 1831 | 1,618 | +309.6% |
| 1841 | 3,647 | +125.4% |
| 1851 | 4,351 | +19.3% |
| 1861 | 3,852 | −11.5% |
| 1871 | 3,774 | −2.0% |
| 1881 | 1,891 | −49.9% |
| 1891 | 1,394 | −26.3% |
| 1901 | 1,101 | −21.0% |
| 1911 | 947 | −14.0% |
| 1926 | 809 | −14.6% |
| 1936 | 847 | +4.7% |
| 1946 | 1,010 | +19.2% |
| 1951 | 925 | −8.4% |
| 1956 | 1,120 | +21.1% |
| 1961 | 1,113 | −0.6% |
| 1966 | 1,154 | +3.7% |
| 1971 | 1,166 | +1.0% |
| 1981 | 1,252 | +7.4% |
| 1986 | 1,260 | +0.6% |
| 1991 | 1,151 | −8.7% |
| 1996 | 1,176 | +2.2% |
| 2002 | 1,183 | +0.6% |
| 2006 | 1,495 | +26.4% |
| 2011 | 1,696 | +13.4% |
Portlaw (Irish:Port Cládach or Port Lách) is a town in County Waterford, Ireland. It is also a parish in the Roman Catholic Diocese of Waterford and Lismore. It is situated some 19 km west-north-west of Waterford City, where the Clodiagh meets the Suir.