- Source: 1886 County Carlow by-election
- 1886 County Carlow by-election
- County Carlow
- List of ministerial by-elections to the Parliament of the United Kingdom
- 1886 Brentford by-election
- 1891 County Carlow by-election
- 1886 Altrincham by-election
- List of MPs elected in the 1886 United Kingdom general election
- 1886 Blackpool by-election
- 1886 Battersea by-election
- 1886 Flintshire by-election
The 1886 County Carlow by-election was a parliamentary by-election held for the United Kingdom House of Commons constituency of County Carlow on 29 January 1886. The sitting member, Edmund Dwyer Gray had been re-elected in the general election of 1885, but having run and been elected also in the new constituency of Dublin St Stephen's Green, he chose to sit for the latter. The County Carlow seat thus became vacant, and in the ensuing by-election, another Irish Nationalist candidate, John Aloysius Blake, was elected unopposed.