The question asked for "towns", so avoiding names like Paris, France, the following are places with a population of less than 100,000 population:
Poughkeepsie, NY
Portland, ME
Palisades Park, NJ
Palo Alto, CA
Prescott, AZ
Portsmouth, OH
Portsmouth, RI
Plymouth, MA
Pawtucket, RI
Paris, TN
Panama City, FL
Piedmont, CA
There are no cities or towns in Canada beginning with the letter X.
Particle.
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pumpkin
PikePlaicePerchPiranha
xian I believe that there are no cities or towns in Canada beginning with the letter X. There is a city named Xian in China.
Some Scottish towns beginning with the letter B are Bathgate, Buckie, and Blairgowrie.
There are no cities or towns in Canada beginning with the letter X.
Preston, Plymouth, Portsmouth.
There are hundreds of towns in Australia that begin with P. Perth (Tasmania), Penguin (Tasmania) and Poatina (Tasmania) would be three off the top of my head.
A slippery metallic beginning with P could be pewter or platinum.
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punch
WollongongWagga WaggaWilloughby
Particle.
Mamoudzou, Le Mans, Marseille, Melun, Metz, Montauban, Montpellier, Moulins are French towns with names beginning by M.
plans