| NORTHEAST INDIANA POPULATION TRENDS | |||||||||
| 1920 | 1930 | 1940 | 1950 | 1960 | 1970 | 1980 | 1990 | 2000 | |
| CENSUS | CENSUS | CENSUS | CENSUS | CENSUS | CENSUS | CENSUS | CENSUS | CENSUS | |
| ADAMS | 20,503 | 19,957 | 21,254 | 22,393 | 24,643 | 26,871 | 29,619 | 31,095 | 33,625 |
| ALLEN | |||||||||
| Aboite Twp | 1,427 | 3,131 | 6,132 | 11,663 | 18,490 | 28,338 | |||
| Adams Twp | 8,495 | 18,428 | 30,913 | 31,897 | 30,962 | 31,394 | |||
| Cedar Creek Twp | 2,200 | 3,579 | 4,414 | 5,864 | 6,688 | 10,288 | |||
| Eel River Twp | 1,238 | 1,432 | 1,622 | 2,423 | 2,576 | 3,004 | |||
| Fort Wayne | 177,495 | 195,680 | 205,727 | ||||||
| Grabill | 658 | 751 | 1,113 | ||||||
| Huntertown | 1,265 | 1,330 | 1,771 | ||||||
| Jackson Twp. | 660 | 699 | 661 | 602 | 561 | 498 | |||
| Jefferson Twp. | 1,616 | 1,895 | 2,130 | 2,142 | 1,882 | 1,958 | |||
| Lafayette Twp. | 1,234 | 1,490 | 2,035 | 2,389 | 2,530 | 2,707 | |||
| Lake Twp. | 1,515 | 1,880 | 2,061 | 2,184 | 1,914 | 1,985 | |||
| Leo-Cedarville | 2,782 | ||||||||
| Madison Twp. | 1,360 | 1,466 | 1,711 | 1,729 | 1,615 | 1,796 | |||
| Marion Twp. | 1,425 | 2,326 | 3,221 | 3,600 | 3,529 | 3,655 | |||
| Maumee Twp. | 1,305 | 1,435 | 1,781 | 2,408 | 2,459 | 2,619 | |||
| Milan Twp. | 1,623 | 1,942 | 2,335 | 3,178 | 3,165 | 3,503 | |||
| Monroe Twp. | 1,955 | 2,158 | 2,153 | 2,174 | 1,969 | 1,963 | |||
| Monroeville | 1,372 | 1,232 | 1,236 | ||||||
| New Haven | 7,125 | 11,234 | 12,406 | ||||||
| Perry Twp. | 2,570 | 4,036 | 5,768 | 8,299 | 10,909 | 18,170 | |||
| Pleasant Twp. | 1,340 | 1,864 | 2,474 | 3,472 | 3,360 | 3,362 | |||
| St. Joseph Twp. | 3,288 | 14,237 | 38,094 | 55,348 | 61,226 | 68,276 | |||
| Scipio Twp. | 347 | 430 | 409 | 396 | 414 | 414 | |||
| Springfield Twp. | 1,606 | 1,875 | 2,608 | 2,987 | 3,169 | 3,697 | |||
| Washington Twp. | 5,868 | 12,608 | 20,296 | 23,851 | 27,416 | 33,105 | |||
| Wayne Twp. | 142,650 | 155,285 | 149,516 | 127,729 | 116,005 | 111,117 | |||
| Woodburn | 1,002 | 1,445 | 1,579 | ||||||
| ALLEN TOTAL | 114,303 | 146,743 | 155,084 | 183,722 | 232,196 | 280,455 | 294,335 | 300,836 | 331,849 |
| DEKALB | 25,600 | 24,911 | 24,756 | 26,023 | 28,271 | 30,837 | 33,607 | 35,324 | 40,285 |
| HUNTINGTON | 31,671 | 29,073 | 29,931 | 31,400 | 33,814 | 34,970 | 35,596 | 35,427 | 38,075 |
| WELLS | 20,509 | 18,411 | 19,099 | 19,564 | 21,220 | 23,821 | 25,401 | 25,948 | 27,600 |
| WHITLEY | 15,660 | 15,931 | 17,001 | 18,828 | 20,954 | 23,395 | 26,215 | 27,651 | 30,707 |
| FW MSA | 228,246 | 255,026 | 267,125 | 301,930 | 361,098 | 420,349 | 444,773 | 456,281 | 502,141 |
| LAGRANGE | 14,009 | 13,780 | 14,352 | 15,347 | 17,380 | 20,890 | 25,550 | 29,477 | 34,909 |
| NOBLE | 22,470 | 22,404 | 22,776 | 25,075 | 28,162 | 31,382 | 35,443 | 37,877 | 46,275 |
| STEUBEN | 13,360 | 13,386 | 13,740 | 17,087 | 17,184 | 20,159 | 24,694 | 27,446 | 33,214 |
| NEI-FW MSA | 49,839 | 49,570 | 50,868 | 57,509 | 62,726 | 72,431 | 85,687 | 94,800 | 114,398 |
| NEI | 278,085 | 304,596 | 317,993 | 359,439 | 423,824 | 492,780 | 530,460 | 551,081 | 616,539 |
| INDIANA | 2,930,390 | 3,238,503 | 3,427,798 | 3,934,224 | 4,662,498 | 5,195,392 | 5,490,224 | 5,544,156 | 6,080,485 |
| UNITED STATES | 106,021,537 | 123,202,624 | 132,164,569 | 151,325,798 | 179,323,175 | 203,302,031 | 226,545,805 | 248,765,170 | |