| Election Name: | 2016 Grand Council election |
| Country: | Basel-Stadt |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 2012 Grand Council election |
| Previous Year: | 2012 |
| Election Date: | 23 October 2016 |
| Next Election: | 2020 Grand Council election |
| Next Year: | 2020 |
| Seats For Election: | All 100 seats in the Grand Council of Basel-Stadt (51 seats needed for a majority) |
| Leader1: | Brigitte Hollinger |
| Party1: | Social Democratic Party of Switzerland |
| Last Election1: | 33 seats, 30.7% |
| Seats Before1: | 33 |
| Seats1: | 34 |
| Seat Change1: | 1 |
| Percentage1: | 32.5% |
| Leader2: | Sebastian Frehner |
| Party2: | Swiss People's Party |
| Last Election2: | 15 seats, 15% |
| Seats Before2: | 15 |
| Seats2: | 15 |
| Percentage2: | 14.3% |
| Swing2: | 0.7pp |
| Leader3: | Patricia von Falkenstein |
| Party3: | Liberal Party of Switzerland |
| Last Election3: | 10 seats, 9.6% |
| Seats Before3: | 10 |
| Seats3: | 14 |
| Seat Change3: | 4 |
| Percentage3: | 13.8% |
| Swing3: | 4.2pp |
| Leader4: | Mück / Zürcher (BastA!), Ackermann / Friedl (Greens) |
| Party4: | Green Party of Switzerland |
| Last Election4: | 13 seats, 11.8% |
| Seats Before4: | 13 |
| Seats4: | 14 |
| Seat Change4: | 1 |
| Percentage4: | 13.4% |
| Swing4: | 1.6pp |
| Leader5: | Luca Urgese |
| Party5: | FDP.The Liberals |
| Last Election5: | 12 seats, 11.1% |
| Seats Before5: | 12 |
| Seats5: | 10 |
| Seat Change5: | 2 |
| Percentage5: | 9.2% |
| Swing5: | 1.9pp |
| Leader6: | Andrea Strahm |
| Party6: | Christian Democratic People's Party of Switzerland |
| Last Election6: | 8 seats, 7.3% |
| Seats Before6: | 8 |
| Seats6: | 7 |
| Seat Change6: | 1 |
| Percentage6: | 5.9% |
| Swing6: | 1.4pp |
| Leader7: | Katja Christ |
| Party7: | Green Liberal Party of Switzerland |
| Last Election7: | 5 seats, 5.0% |
| Seats Before7: | 5 |
| Seats7: | 4 |
| Seat Change7: | 1 |
| Percentage7: | 4.3% |
| Swing7: | 0.7pp |
| Leader8: | Beatrice Mahler |
| Party8: | Evangelical People's Party of Switzerland |
| Last Election8: | 1, 1.4% |
| Seats Before8: | 1 |
| Seats8: | 1 |
| Percentage8: | 1.4% |
| Leader9: | Gabriella Ess Dahinden |
| Party9: | Active Bettingen |
| Last Election9: | 1, 0.7% |
| Seats Before9: | 1 |
| Seats9: | 1 |
| Percentage9: | 0.7% |
| Swing9: | [1] |
Elections to the Grand Council of Basel-Stadt were held on 23 October 2016. The big winners were the Liberal Party of Basel-Stadt, who increased their popular vote from 9.6% in 2012 to 13.8% and gaining four additional seats. Both centre-left parties, the Social Democrats and the Green Party also gained ground and won one additional seat each. The losers of the elections were the centrist Christian Democratic People's Party, which lost one seat, the Green Liberal Party who lost one seat and the FDP who lost two seats; the right-wing anti-immigration party "Volksaktion" lost both of their seats.
| Date | style="width:350px;" | Institution | SPS | SVP | GPS | FDP | LDP | CVP | GLP | EVP | Other | Lead |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 23 October 2016 | Grand council election, 2016 | 32.5% | 14.3% | 13.4% | 9.2% | 13.8% | 5.9% | 4.3% | 1.4% | 5.2% | 18.2% | |
| 14 October 2016 | Tageswoche/bzBasel | 30.4% | 17.4% | 10.6% | 10.4% | 12.8% | 6.5% | 4.5% | 3.9% | 3.5% | 13.0% | |
| 9 September 2016 | Tageswoche/bzBasel | 30.3% | 16.9% | 10.3% | 11.5% | 12.8% | 6.9% | 3.8% | 3.9% | 3.6% | 13.4% | |
| 28 October 2012 | Grand council election, 2012 | 30.7% | 15% | 11.8% | 11.1% | 9.6% | 7.3% | 5.0% | 4.2% | 5.3%[2] | 15.7% |