The 1842 Newfoundland general election was held on December 20, 1842, to elect the members of the 3rd General Assembly of Newfoundland in the Newfoundland Colony. The original constitution was suspended following conflict between the House of Assembly and the Legislative Council, and Governor John Harvey combined the two legislatures into an amalgamated assembly.
|- |bgcolor=whitesmoke rowspan=3|St. John's || |Laurence O'Brien<br>1,629<br>20.23% | |Walter R. Grieve<br>1,161<br>14.42% || |William Carson |- || |John Nugent<br>1,571<br>19.51% | |Thomas Bennett<br>1,127<br>13.99% || |John Kentâ |- || |William Carson<br>1,539<br>19.11% | |Patrick Kough<br>1,027<br>12.75% || |Laurence O'Brien
|- |bgcolor=whitesmoke rowspan=4|Conception Bay || |James Prendergast<br>1,344<br>17.50% || |Thomas Ridley<br>1,425<br>18.56% |rowspan=4| |rowspan=4|Daniel O'Connell (Independent Liberal)<br>227<br>2.96% || |Peter Brown |- || |Edmund Hanrahan<br>1,325<br>17.25% |rowspan=3 | |rowspan=3|John Munn<br>1,405<br>18.30% || |Vacant |- | |John McCarthy<br>1,015<br>13.22% || |John McCarthy |- | |Peter Brown<br>938<br>12.22% || |James Powerâ |- |bgcolor=whitesmoke|Ferryland | |Peter Winser<br>258<br>47.34% || |Thomas Glen<br>287<br>52.66% | | || |Peter Winser |- |bgcolor=whitesmoke rowspan=2|Placentia and St. Mary's || |John Dillon<br>336<br> |rowspan=2| |rowspan=2|John Barron<br>140<br> | | || |Patrick Doyleâ |- || |Simon Morris<br>Total unknown | | || |John Nugentâ¡<br><small>(ran in St. John's)</small>
|- |bgcolor=whitesmoke|Bonavista Bay | | || |Robert Carter<br>Won by acclamation || |Hugh Emersonâ |- |bgcolor=whitesmoke|Burin || |Clement Benning<br>241<br>65.67% | |Henry Winton<br>126<br>34.33% || |Henry Butlerâ |- |bgcolor=whitesmoke|Fortune Bay | | || |Bryan Robinson<br>Won by acclamation || |William B. Rowâ |- |bgcolor=whitesmoke|Trinity Bay | | || |Richard Barnes<br>Won by acclamation || |Thomas Mooreâ |- |bgcolor=whitesmoke|Twillingate and Fogo | | || |John Slade<br>Won by acclamation || |Edward Dwyerâ |-