| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Bagenal's Arms Cross Roads | city | Carlow | Ireland | 52.80 | -6.89 | 259 | 13049 |
| Bagenalstown | city | Carlow | Ireland | 52.70 | -6.99 | 121 | 5244 |
| Bagenal’s Arms Cross Roads | city | Carlow | Ireland | 52.80 | -6.89 | 259 | 13049 |
| Baile Haicéid | city | Carlow | Ireland | 52.86 | -6.56 | 830 | 1901 |
| Baile Uí Mhurchú | city | Carlow | Ireland | 52.57 | -6.86 | 252 | 1293 |
| Balana | city | Carlow | Ireland | 52.74 | -6.77 | 308 | 1987 |
| Ballaghaderren | city | Carlow | Ireland | 52.70 | -6.87 | 357 | 1827 |
| Ballaghmore Cross Roads | city | Carlow | Ireland | 52.71 | -6.79 | 341 | 2057 |
| Ballinabranagh | city | Carlow | Ireland | 52.79 | -6.98 | 239 | 4351 |
| Ballinacarrig | city | Carlow | Ireland | 52.82 | -6.92 | 177 | 19923 |
| Ballinacarrig Bridge | city | Carlow | Ireland | 52.82 | -6.92 | 177 | 19923 |
| Ballinadrum | city | Carlow | Ireland | 52.75 | -6.78 | 301 | 2469 |
| Ballinagilky House | city | Carlow | Ireland | 52.84 | -6.53 | 830 | 1919 |
| Ballinkillin | city | Carlow | Ireland | 52.65 | -6.93 | 285 | 2489 |
| Ballon | city | Carlow | Ireland | 52.74 | -6.77 | 308 | 1987 |
| Ballybannon | city | Carlow | Ireland | 52.78 | -6.96 | 134 | 7178 |
| Ballybeg | city | Carlow | Ireland | 52.53 | -6.88 | 259 | 1356 |
| Ballybit Cross Roads | city | Carlow | Ireland | 52.85 | -6.71 | 364 | 3799 |
| Ballybrommell | city | Carlow | Ireland | 52.74 | -6.88 | 830 | 1825 |
| Ballycarney | city | Carlow | Ireland | 52.81 | -6.94 | 157 | 14420 |
| Ballycrinnigan | city | Carlow | Ireland | 52.51 | -6.88 | 830 | 1242 |
| Ballyduff | city | Carlow | Ireland | 52.83 | -6.62 | 367 | 1643 |
| Ballyedmond | city | Carlow | Ireland | 52.88 | -6.53 | 830 | 1587 |
| Ballyellin Cross Roads | city | Carlow | Ireland | 52.63 | -6.98 | 160 | 2505 |
| Ballyglisheen | city | Carlow | Ireland | 52.55 | -6.87 | 249 | 1373 |
| Ballyhacket | city | Carlow | Ireland | 52.86 | -6.75 | 328 | 1892 |
| Ballyhacket Cross Roads | city | Carlow | Ireland | 52.86 | -6.74 | 324 | 3445 |
| Ballykeenan | city | Carlow | Ireland | 52.55 | -6.91 | 249 | 2322 |
| Ballylennon Cross Roads | city | Carlow | Ireland | 52.85 | -6.87 | 262 | 13719 |
| Ballymartin | city | Carlow | Ireland | 52.63 | -6.91 | 255 | 2262 |
| Ballymoon | city | Carlow | Ireland | 52.70 | -6.92 | 830 | 4446 |
| Ballymurphy | city | Carlow | Ireland | 52.57 | -6.86 | 252 | 1293 |
| Ballynabranagh | city | Carlow | Ireland | 52.56 | -6.82 | 830 | 1151 |
| Ballynakill | city | Carlow | Ireland | 52.68 | -6.85 | 370 | 1714 |
| Ballynakill | city | Carlow | Ireland | 52.82 | -6.62 | 360 | 1392 |
| Ballynasillage | city | Carlow | Ireland | 52.62 | -6.91 | 209 | 2130 |
| Ballyoliver | city | Carlow | Ireland | 52.87 | -6.70 | 406 | 2430 |
| Ballyrvan | city | Carlow | Ireland | 52.76 | -6.91 | 830 | 2833 |
| Ballytarsha Cross Roads | city | Carlow | Ireland | 52.75 | -6.87 | 830 | 1875 |
| Ballyveal | city | Carlow | Ireland | 52.75 | -6.81 | 305 | 1888 |
| Bang Up Corner | city | Carlow | Ireland | 52.76 | -6.74 | 262 | 4053 |
| Bannagagole | city | Carlow | Ireland | 52.72 | -7.03 | 370 | 2353 |
| Barmona | city | Carlow | Ireland | 52.58 | -6.90 | 216 | 2008 |
| Barnhill | city | Carlow | Ireland | 52.88 | -6.63 | 830 | 2030 |
| Baunogephlure | city | Carlow | Ireland | 52.83 | -6.80 | 301 | 2145 |
| Bilboa | city | Carlow | Ireland | 52.80 | -7.04 | 1013 | 1677 |
| Black Bridge | city | Carlow | Ireland | 52.78 | -7.08 | 830 | 1425 |
| Blacklion | city | Carlow | Ireland | 52.75 | -6.67 | 830 | 1341 |
| Boolyvannanan | city | Carlow | Ireland | 52.79 | -7.06 | 889 | 1556 |
| Borris | city | Carlow | Ireland | 52.60 | -6.92 | 160 | 2172 |
| Borris-Idrone | city | Carlow | Ireland | 52.60 | -6.92 | 160 | 2172 |
| Brownbog | city | Carlow | Ireland | 52.87 | -6.60 | 830 | 1855 |
| Bullys Corner | city | Carlow | Ireland | 52.85 | -6.57 | 830 | 1938 |
| Burren Bridge | city | Carlow | Ireland | 52.66 | -6.79 | 830 | 1351 |