Jamaica has elected its House of Representatives by the single-member plurality electoral system since 1944. Though Jamaica has used the same basic electoral system, the expansion in the size of Parliament and change in status from British crown colony to independent country results in the definition of multiple electoral systems:
Jamaica 1 (1944-55): 32 seats (British crown colony).
Jamaica 2 (1959-62): 45 seats (British crown colony).
Jamaica 3 (1967-): 53 seats in 1967-72, 60 seats in 1976-2007, 63 seats in 2012 (independent Jamaica).
The following table shows the apportionment of single-member constituencies to counties and parishes:
Report to Parliament on Realignment of Boundaries and Increase in the Number of Constituencies, 2010
The following two maps show Jamaica’s counties and parishes.
Counties of Jamaica
Here are links to detailed maps for each constituency in 2012 and 2016.
Sources: Electoral Commission of Jamaica, Trevor Munroe and Arnold Bertram, Adult Suffrage and Political Administrations in Jamaica, 1944-2002 (Miami: Ian Randle 2006).