| Name | Population | Altitude | Latitude | Longitude | 
| La Barantonnerie : | 
 | 172 m | 48°40'59.9" N | 1°51'0.0" E | 
| Labbeville (Labbeville) : | 515 | 41 m | 49°7'59.9" N | 2°8'60.0" E | 
| Laberliere (Laberlière) : | 171 | 96 m | 49°34'59.9" N | 2°46'0.0" E | 
| Laboissiere-en-santere (Laboissière-en-Santere) : | 
 | 
 | 49°40'0.1" N | 2°40'60.0" E | 
| Laboissiere-en-santerre (Laboissière-en-Santerre) : | 122 | 96 m | 49°40'0.1" N | 2°40'60.0" E | 
| Laboissiere-en-thelle (Laboissière-en-Thelle) : | 1 309 | 207 m | 49°17'60.0" N | 2°8'60.0" E | 
| Laboissiere (Laboissière) : | 
 | 
 | 49°17'60.0" N | 2°8'60.0" E | 
| Laboissiere-saint-martin (Laboissière-Saint-Martin) : | 
 | 177 m | 49°49'59.9" N | 1°49'0.0" E | 
| Labosse (Labosse) : | 434 | 155 m | 49°21'0.0" N | 1°53'60.0" E | 
| La Bouteille (La Bouteille) : | 522 | 206 m | 49°52'0.1" N | 3°58'0.0" E | 
| Labruyere (Labruyère) : | 607 | 64 m | 49°22'0.1" N | 2°31'0.0" E | 
| La Bucaille : | 
 | 155 m | 50°16'0.1" N | 1°45'0.0" E | 
| La Capelle-en-thierache (La Capelle-en-Thiérache) : | 
 | 
 | 49°58'0.1" N | 3°55'0.0" E | 
| La Capelle (La Capelle) : | 2 107 | 222 m | 49°58'0.1" N | 3°55'0.0" E | 
| La Celle : | 
 | 
 | 48°52'0.1" N | 3°28'0.0" E | 
| La Celle-sous-montmirail (La Celle-sous-Montmirail) : | 82 | 120 m | 48°52'0.1" N | 3°28'0.0" E | 
| Lachapelle-aux-pots (Lachapelle-aux-Pots) : | 1 614 | 151 m | 49°28'0.1" N | 1°53'60.0" E | 
| La Chapelle-en-serval (La Chapelle-en-Serval) : | 2 592 | 66 m | 49°7'59.9" N | 2°31'60.0" E | 
| La Chapelle-en-vexin (La Chapelle-en-Vexin) : | 331 | 150 m | 49°10'59.9" N | 1°43'60.0" E | 
| La Chapelle : | 
 | 
 | 48°57'0.0" N | 3°22'60.0" E | 
| Lachapelle : | 
 | 190 m | 49°16'0.1" N | 2°13'60.0" E | 
| La Chapelle-monthodon (La Chapelle-Monthodon) : | 210 | 164 m | 49°1'0.1" N | 3°37'60.0" E | 
| Lachapelle-saint-pierre (Lachapelle-Saint-Pierre) : | 955 | 190 m | 49°16'0.1" N | 2°13'60.0" E | 
| Lachapelle-sous-gerberoy (Lachapelle-sous-Gerberoy) : | 147 | 112 m | 49°31'59.9" N | 1°52'0.0" E | 
| La Chapelle-sur-chezy (La Chapelle-sur-Chézy) : | 222 | 205 m | 48°57'0.0" N | 3°22'60.0" E | 
| Lachapelle-sur-poix : | 
 | 130 m | 49°46'0.1" N | 1°57'0.0" E | 
| La Chaussee (La Chaussée) : | 
 | 200 m | 49°34'0.1" N | 2°10'0.0" E | 
| La Chaussee-tirancourt (La Chaussée-Tirancourt) : | 692 | 15 m | 49°57'0.0" N | 2°8'60.0" E | 
| La Chavatte (La Chavatte) : | 39 | 92 m | 49°45'0.0" N | 2°46'0.0" E | 
| Lachelle (Lachelle) : | 596 | 81 m | 49°27'0.0" N | 2°43'60.0" E | 
| La Croix : | 
 | 
 | 49°10'0.1" N | 3°21'0.0" E | 
| Lacroix-saint-ouen (Lacroix-Saint-Ouen) : | 4 649 | 36 m | 49°21'0.0" N | 2°46'60.0" E | 
| La Croix-sur-ourcq (La Croix-sur-Ourcq) : | 91 | 160 m | 49°10'0.1" N | 3°21'0.0" E | 
| La Dreue : | 
 | 180 m | 49°37'0.1" N | 1°52'60.0" E | 
| La Faloise (La Faloise) : | 216 | 140 m | 49°42'0.0" N | 2°21'0.0" E | 
| La Fere (La Fère) : | 2 880 | 50 m | 49°40'0.1" N | 3°22'0.0" E | 
| La Ferte-chevresis (La Ferté-Chevresis) : | 588 | 113 m | 49°43'59.9" N | 3°34'0.0" E | 
| La Ferte (La Ferté) : | 
 | 
 | 49°43'59.9" N | 3°34'0.0" E | 
| La Ferte-milon (La Ferté-Milon) : | 2 359 | 128 m | 49°10'0.1" N | 3°7'0.0" E | 
| Laffause : | 
 | 155 m | 49°27'0.0" N | 3°25'0.0" E | 
| Laffaux (Laffaux) : | 122 | 155 m | 49°27'0.0" N | 3°25'0.0" E | 
| La Flamengrie (La Flamengrie) : | 367 | 120 m | 50°0'0.0" N | 3°55'0.0" E | 
| La Fonderie : | 
 | 192 m | 49°22'0.1" N | 1°52'60.0" E | 
| Lafraye (Lafraye) : | 293 | 144 m | 49°30'0.0" N | 2°13'0.0" E | 
| Lafresnoye : | 
 | 185 m | 49°49'0.1" N | 1°48'0.0" E | 
| Lagny : | 
 | 102 m | 49°4'59.9" N | 2°45'0.0" E | 
| Lagny-le-sec (Lagny-le-Sec) : | 1 882 | 102 m | 49°4'59.9" N | 2°45'0.0" E | 
| La Grande Cour : | 
 | 185 m | 49°22'0.1" N | 1°51'0.0" E | 
| La Haute Rue : | 
 | 176 m | 49°28'0.1" N | 1°52'60.0" E | 
| Lahaye-saint-romain : | 
 | 183 m | 49°43'0.1" N | 1°58'60.0" E | 
| La Herelle (La Hérelle) : | 167 | 122 m | 49°34'59.9" N | 2°25'0.0" E | 
| La Herie (La Hérie) : | 170 | 160 m | 49°52'59.9" N | 4°2'60.0" E | 
| La Houssoye (La Houssoye) : | 653 | 159 m | 49°22'0.1" N | 1°55'60.0" E | 
| Lahoussoye (Lahoussoye) : | 335 | 115 m | 49°57'0.0" N | 2°28'60.0" E | 
| Laigneville (Laigneville) : | 3 964 | 48 m | 49°17'60.0" N | 2°27'0.0" E | 
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