| Population | |||||
|---|---|---|---|---|---|
| Population per Square Mile | |||||
| 1960 | 1970 | 1980 | 1990 | 2000 | |
| Cajun | 55.98 | 60.77 | 68.16 | 68.12 | 114.38 |
| Central Louisiana | 55.12 | 67.13 | 84.46 | 88.62 | 35.45 |
| Greater New Orleans | 634.17 | 678.57 | 719.94 | 676.10 | 567.82 |
| Louisiana | 74.76 | 83.58 | 96.54 | 96.86 | 102.58 |
| Northern Louisiana | 54.06 | 55.24 | 61.45 | 60.15 | 97.05 |
| Plantation | 94.96 | 114.26 | 143.46 | 154.19 | 173.37 |
| Population | |||||
|---|---|---|---|---|---|
| Population per Square Mile | |||||
| 1960 | 1970 | 1980 | 1990 | 2000 | |
| Acadia | 76.20 | 79.52 | 86.11 | 85.28 | 89.82 |
| Allen | 25.98 | 27.20 | 27.98 | 27.76 | 33.27 |
| Ascension | 95.77 | 127.18 | 171.70 | 199.64 | 262.78 |
| Assumption | 53.12 | 58.03 | 65.20 | 67.18 | 69.05 |
| Avoyelles | 45.17 | 45.35 | 49.72 | 47.04 | 49.83 |
| Beauregard | 16.54 | 19.73 | 25.59 | 25.93 | 28.43 |
| Bienville | 20.63 | 19.77 | 20.21 | 19.71 | 19.43 |
| Bossier | 68.72 | 76.95 | 96.27 | 102.67 | 117.25 |
| Caddo | 253.78 | 260.95 | 286.09 | 281.43 | 285.86 |
| Calcasieu | 135.81 | 135.75 | 156.11 | 156.96 | 171.38 |
| Caldwell | 17.00 | 17.67 | 20.32 | 18.53 | 19.94 |
| Cameron | 5.26 | 6.24 | 7.11 | 7.05 | 7.61 |
| Catahoula | 16.23 | 16.72 | 17.46 | 15.72 | 15.52 |
| Claiborne | 25.71 | 22.56 | 22.65 | 23.06 | 22.33 |
| Concordia | 29.39 | 32.42 | 33.00 | 29.91 | 29.07 |
| De Soto | 27.64 | 25.95 | 29.33 | 28.89 | 699.72 |
| East Baton Rouge | 504.85 | 625.78 | 803.58 | 834.11 | 905.97 |
| East Carroll | 34.24 | 30.57 | 27.93 | 23.03 | 22.35 |
| East Feliciana | 44.55 | 38.94 | 41.94 | 42.37 | 47.11 |
| Evangeline | 47.63 | 48.07 | 50.19 | 50.09 | 53.34 |
| Franklin | 41.85 | 38.41 | 38.72 | 35.91 | 34.11 |
| Grant | 20.66 | 21.19 | 25.89 | 27.17 | 28.98 |
| Iberia | 89.81 | 99.79 | 110.83 | 118.74 | 127.37 |
| Iberville | 48.39 | 49.69 | 51.98 | 50.18 | 53.85 |
| Jackson | 27.77 | 28.01 | 30.39 | 27.55 | 27.01 |
| Jefferson | 682.47 | 1103.52 | 1486.08 | 1465.53 | 698.14 |
| Jefferson Davis | 45.72 | 45.30 | 49.31 | 47.09 | 102.76 |
| Lafayette | 51.05 | 63.55 | 76.04 | 79.15 | 607.55 |
| LaFourche | 20.85 | 21.31 | 27.25 | 21.90 | 77.07 |
| La Salle | 313.66 | 406.51 | 555.82 | 610.46 | 27.09 |
| Lincoln | 60.53 | 71.70 | 84.35 | 88.56 | 90.18 |
| Livingston | 41.62 | 56.34 | 90.74 | 108.82 | 141.67 |
| Madison | 26.35 | 24.14 | 25.60 | 19.97 | 22.00 |
| Morehouse | 42.44 | 40.87 | 43.82 | 40.21 | 39.05 |
| Natchitoches | 28.38 | 28.03 | 31.73 | 29.20 | 31.10 |
| Orleans | 3474.67 | 3286.11 | 3087.02 | 2751.59 | 2683.69 |
| Ouachita | 166.39 | 188.85 | 227.89 | 232.72 | 241.00 |
| Plaquemines | 26.69 | 29.87 | 30.84 | 30.28 | 31.68 |
| Pointe Coupee | 40.34 | 39.47 | 43.14 | 40.44 | 40.84 |
| Rapides | 84.18 | 89.27 | 102.28 | 99.46 | 95.51 |
| Red River | 25.68 | 23.74 | 26.85 | 24.16 | 24.76 |
| Richland | 42.66 | 38.99 | 39.73 | 36.94 | 37.57 |
| Sabine | 21.45 | 21.54 | 29.22 | 26.17 | 27.11 |
| St. Bernard | 69.19 | 110.03 | 137.78 | 143.23 | 144.52 |
| St. Charles | 74.79 | 104.16 | 131.33 | 149.58 | 169.45 |
| St. Helena | 22.43 | 24.33 | 24.06 | 24.18 | 25.77 |
| St. James | 74.64 | 80.18 | 87.34 | 84.84 | 86.21 |
| St. John the Baptist | 84.23 | 108.78 | 145.84 | 182.71 | 196.64 |
| St. Landry | 87.75 | 86.53 | 90.59 | 86.50 | 94.43 |
| St. Martin | 39.28 | 43.86 | 54.35 | 59.44 | 65.66 |
| St. Mary | 79.68 | 99.12 | 104.83 | 94.77 | 87.29 |
| St. Tammany | 45.23 | 74.42 | 129.76 | 169.13 | 223.86 |
| Tangipahoa | 75.20 | 83.35 | 102.11 | 108.45 | 127.28 |
| Tensas | 19.58 | 16.15 | 14.15 | 11.79 | 10.98 |
| Terrebonne | 48.42 | 60.59 | 75.21 | 77.27 | 83.26 |
| Union | 20.08 | 21.02 | 24.12 | 23.57 | 25.98 |
| Vermilion | 33.10 | 36.69 | 41.28 | 42.64 | 45.84 |
| Vernon | 13.78 | 40.49 | 40.25 | 46.64 | 39.54 |
| Washington | 65.73 | 62.70 | 66.02 | 64.49 | 65.60 |
| Webster | 66.62 | 67.02 | 73.22 | 70.46 | 70.20 |
| West Baton Rouge | 77.38 | 88.20 | 99.82 | 101.56 | 112.98 |
| West Carroll | 39.45 | 36.25 | 35.95 | 33.65 | 34.26 |
| West Feliciana | 30.53 | 28.02 | 30.01 | 31.81 | 37.22 |
| Winn | 16.87 | 17.22 | 18.15 | 17.11 | 17.77 |