| L. Joan MacAlpine-Stiles | |
| Birth Place: | Rexton, New Brunswick |
| Office1: | MLA for Moncton South |
| Term Start1: | 1999 |
| Term End1: | 2006 |
| Predecessor1: | James E. Lockyer |
| Successor1: | district abolished |
| Office2: | MLA for Moncton West |
| Term Start2: | 2006 |
| Term End2: | 2010 |
| Predecessor2: | new district |
| Successor2: | Susan Stultz |
| Party: | Progressive Conservative (1999–2007) Liberal (2007–present) |
| Spouse: | Wally Stiles |
| Nationality: | Canadian |
L. Joan MacAlpine-Stiles (known earlier in her career as Joan MacAlpine) is a politician in the province of New Brunswick, Canada. She served as Member of the Legislative Assembly (MLA) for Moncton West from 1999 until 2010. She is the wife of fellow MLA Wally Stiles; they were married while in office in 2005.
She previously served in the province's cabinet from 1999 to 2006.
MacAlpine was elected to the Moncton City Council in 1992, 1995 and 1998 before resigning to accept her seat in the legislature.
On April 17, 2007, she announced that she would cross the floor to join the Liberal party, along with her husband and fellow MLA Wally Stiles.[1] She did not stand for reelection in 2010.[2]
|Progressive Conservative|Joan MacAlpine-Stiles||align=right|3317||align=right|52.40||align=right|+4.69||align=right|$23,231|-|Liberal|Gene Joseph Devereaux||align=right|3013||align=right|47.60||align=right|+6.46||align=right|$15,604|-|colspan=3 align=right|Total valid votes/expense limit||align=right|6330||align=right|100.00||align=right colspan=2|$30,367|-|colspan=3 align=right|Total rejected ballots||align=right|61||align=right|0.54||colspan=2||-|colspan=3 align=right|Turnout||align=right|6391||align=right|56.96||align=right|+1.00||||-|colspan=3 align=right|Electors on list||align=right|11,221||colspan=3||-|bgcolor="#9999FF"| |style="width: 180px" colspan=2|Progressive Conservative hold|align=right|Swing||align=right|-0.89||colspan=2||}
|Progressive Conservative|Joan MacAlpine||align=right|3143||align=right|47.71||align=right|-6.20||align=right|$21,525|-|Liberal|Norman Branch||align=right|2710||align=right|41.14||align=right|+4.56||align=right|$14,473|-|NDP|Stéphane Drysdale||align=right|437||align=right|6.63||align=right|-2.87||align=right|$0|-|Independent|John Gallant||align=right|226||align=right|3.43||align=right|*||align=right|not filed|-|Grey Party|Jean-Marc (Diggit) Dugas||align=right|72||align=right|1.09||align=right|*||align=right|not filed|-|colspan=3 align=right|Total valid votes/expense limit||align=right|6588||align=right|100.00||align=right colspan=2|$30,801|-|colspan=3 align=right|Total rejected ballots||align=right|41||align=right|0.35||colspan=2||-|colspan=3 align=right|Turnout||align=right|6629||align=right|55.96||align=right|-11.57||||-|colspan=3 align=right|Electors on list||align=right|11,847||colspan=3||-|bgcolor="#9999FF"| |style="width: 180px" colspan=2|Progressive Conservative hold|align=right|Swing||align=right|-5.38||colspan=2||}
|Progressive Conservative|Joan MacAlpine||align=right|3898||align=right|53.91||align=right|+36.27||align=right|$19,681|-|Liberal|Jim Lockyer||align=right|2645||align=right|36.58||align=right|-25.25||align=right|$17,326|-|NDP|Teresa Sullivan||align=right|687||align=right|9.50||align=right|+1.26||align=right|$2,650|-|colspan=3 align=right|Total valid votes/expense limit||align=right|7230||align=right|100.00||align=right colspan=2|$24,708|-|colspan=3 align=right|Total rejected ballots||align=right|22||align=right|0.20||colspan=2||-|colspan=3 align=right|Turnout||align=right|7252||align=right|67.53||align=right|+4.81||||-|colspan=3 align=right|Electors on list||align=right|10,739||colspan=3||-|bgcolor="#9999FF"| |style="width: 180px" colspan=2|Progressive Conservative gain from Liberal|align=right|Swing||align=right|+30.76||colspan=2||}