| Honorific-Prefix: | The Hon. |
| Daniel Aloysius Riley | |
| Office1: | Senator for Saint John, New Brunswick |
| Nominator1: | Pierre Trudeau |
| Term Start1: | December 21, 1973 |
| Term End1: | September 13, 1984 |
| Constituency Mp2: | St. John—Albert |
| Parliament2: | Canadian |
| Predecessor2: | King Hazen |
| Successor2: | Thomas Miller Bell |
| Term Start2: | June 27, 1949 |
| Term End2: | August 9, 1953 |
| Office3: | Member of the New Brunswick Legislature for Saint John City |
| Term Start3: | April 22, 1963 |
| Term End3: | 1967 |
| Birth Date: | 1916 5, df=yes |
| Birth Place: | Charlottetown, Prince Edward Island |
| Party: | Liberal |
Daniel Aloysius Riley (11 May 1916 - 13 September 1984) was a Canadian politician.
Born in Charlottetown, Prince Edward Island, he received a Bachelor of Civil Law degree from the University of New Brunswick in 1940.
In 1949, he was elected to the House of Commons of Canada for the New Brunswick riding of St. John—Albert. A Liberal, he was defeated in the 1953 election and again in the 1957 election.
In 1963, he was elected to the Legislative Assembly of New Brunswick and was the Liberal Minister of Lands and Forests in the Louis Robichaud cabinet. He resigned in 1966 and was appointed chairman of the New Brunswick Motor Carrier Board and Public Utilities Commission. He was summoned to the Senate of Canada in 1973 representing the senatorial division of Saint John, New Brunswick.
He served until his death in 1984.