| Statistic | Reportedincidents | /100k people | Castalia/100k people | Iowa/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 1,956 (estimate) | 1,540 | 2,119 |
| Murder | n/a | n/a | n/a | 2.1 | 5.0 |
| Rape | n/a | n/a | n/a | 35.2 | 37.5 |
| Robbery | n/a | n/a | n/a | 18.7 | 60.6 |
| Assault | n/a | n/a | n/a | 187.2 | 256.1 |
| Violent crime | n/a | n/a (estimate) | 309 (estimate) | 243 | 359 |
| Burglary | n/a | n/a | n/a | 199.1 | 229.2 |
| Theft | n/a | n/a | n/a | 962.6 | 1,272.1 |
| Vehicle theft | n/a | n/a | n/a | 135.1 | 258.8 |
| Property crime | n/a | n/a (estimate) | 1,647 (estimate) | 1,297 | 1,760 |


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| Item | Castalia | Iowa | National |
| Law enforcement employees (officers & civilians) | n/a | 3,827 | 558,732 |
| Police officers & civilians /1000 residents | n/a | 1.8 | 3.3 |
| State | Total offenders | Iowa /100K | National /100K |
| Iowa | 6,040 | 205 | 266 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Decorah, IA | 7,615 | 119 | 224 | 343 |
| Waukon, IA | 3,663 | 27 | 425 | 452 |
| Monona, IA | 1,639 | 87 | 463 | 549 |
| West Union, IA | 2,630 | 104 | 555 | 660 |
| Postville, IA | 2,528 | 293 | 587 | 880 |
| Calmar, IA | 989 | 230 | 1,230 | 1,460 |
| Ossian, IA | 798 | 241 | 1,285 | 1,526 |
| Castalia, IA | 169 | 309 | 1,647 | 1,956 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Virginia City, MT | 169 | 199 | 758 | 957 |
| Sisquoc, CA | 169 | 582 | 2,488 | 3,069 |
| Binford, ND | 169 | 361 | 2,389 | 2,749 |
| Waverly, WA | 169 | 476 | 3,600 | 4,076 |
| Amsterdam, MT | 169 | 359 | 1,371 | 1,730 |
| Castalia, IA | 169 | 309 | 1,647 | 1,956 |