Local Data Search
A total of 374 results found. Show Results on Map. The education index is an indicator of the average education level of the population. A higher education index value means more educated population.
| Rank | Average Education Index ▲ | City / Population |
| 1. | 10.86 | Stone Park, IL / 4,930 |
| 2. | 11.20 | Cicero, IL / 83,332 |
| 3. | 11.65 | Summit, IL / 10,865 |
| 4. | 11.68 | Capron, IL / 1,369 |
| 5. | 11.69 | Melrose Park, IL / 24,725 |
| 6. | 11.74 | Hodgkins, IL / 2,440 |
| 7. | 11.75 | East Chicago, IN / 30,218 |
| 8. | 11.75 | Park City, IL / 7,600 |
| 9. | 11.76 | Robbins, IL / 5,282 |
| 10. | 11.78 | Northlake, IL / 12,156 |
| 11. | 11.94 | Millington, IL / 878 |
| 12. | 11.95 | Posen, IL / 5,684 |
| 13. | 11.97 | South Chicago Heights, IL / 4,073 |
| 14. | 11.98 | Burbank, IL / 28,427 |
| 15. | 11.99 | Dixmoor, IL / 3,663 |
| 16. | 12.00 | Blue Island, IL / 22,990 |
| 17. | 12.02 | Ford Heights, IL / 2,858 |
| 18. | 12.02 | Ingalls Park, IL / 3,684 |
| 19. | 12.03 | Harvard, IL / 8,621 |
| 20. | 12.03 | Harvey, IL / 25,489 |
| 21. | 12.05 | Waukegan, IL / 89,382 |
| 22. | 12.06 | Rockdale, IL / 1,954 |
| 23. | 12.08 | Rosemont, IL / 3,985 |
| 24. | 12.10 | Carbon Hill, IL / 442 |
| 25. | 12.12 | Fairmont, IL / 2,044 |
| 26. | 12.14 | Phoenix, IL / 2,131 |
| 27. | 12.15 | Lily Lake, WI / 553 |
| 28. | 12.15 | Pell Lake, WI / 3,420 |
| 29. | 12.16 | Godley, IL / 860 |
| 30. | 12.18 | Franklin Park, IL / 18,346 |
| 31. | 12.18 | Plattville, IL / 152 |
| 32. | 12.20 | Sharon, WI / 1,474 |
| 33. | 12.23 | Virgil, IL / 363 |
| 34. | 12.23 | Maywood, IL / 24,338 |
| 35. | 12.23 | Belvidere, IL / 25,303 |
| 36. | 12.24 | Hammond, IN / 81,312 |
| 37. | 12.27 | Bensenville, IL / 18,661 |
| 38. | 12.28 | Carpentersville, IL / 37,094 |
| 39. | 12.31 | Hillcrest, IL / 1,292 |
| 40. | 12.35 | Symerton, IL / 94 |
| 41. | 12.36 | Preston Heights, IL / 2,793 |
| 42. | 12.36 | Bridgeview, IL / 16,144 |
| 43. | 12.38 | Mccullom Lake, IL / 1,209 |
| 44. | 12.39 | Stickney, IL / 6,608 |
| 45. | 12.40 | Whiting, IN / 5,021 |
| 46. | 12.41 | Lisbon, IL / 292 |
| 47. | 12.41 | Burnham, IL / 4,188 |
| 48. | 12.41 | Round Lake Park, IL / 7,232 |
| 49. | 12.44 | Lakewood Shores, IL / 1,465 |
| 50. | 12.44 | Round Lake Beach, IL / 28,006 |
| 51. | 12.45 | Rochelle, IL / 9,597 |
| 52. | 12.48 | Chicago Heights, IL / 30,414 |
| 53. | 12.49 | Berwyn, IL / 55,584 |
| 54. | 12.50 | Shabbona, IL / 1,194 |
| 55. | 12.51 | Earlville, IL / 1,728 |
| 56. | 12.52 | Gary, IN / 84,407 |
| 57. | 12.52 | Thornton, IL / 2,452 |
| 58. | 12.55 | Markham, IL / 12,408 |
| 59. | 12.55 | Compton, IL / 292 |
| 60. | 12.55 | Bellwood, IL / 19,114 |
| 61. | 12.56 | Highwood, IL / 5,452 |
| 62. | 12.57 | Norridge, IL / 14,414 |
| 63. | 12.60 | Wilmot, WI / 448 |
| 64. | 12.60 | New Milford, IL / 732 |
| 65. | 12.62 | Marseilles, IL / 5,159 |
| 66. | 12.62 | Round Lake Heights, IL / 2,865 |
| 67. | 12.62 | Braceville, IL / 858 |
| 68. | 12.66 | North Chicago, IL / 33,010 |
| 69. | 12.68 | Mccook, IL / 365 |
| 70. | 12.70 | Mazon, IL / 887 |
| 71. | 12.70 | Addison, IL / 36,670 |
| 72. | 12.70 | Pistakee Highlands, IL / 3,455 |
| 73. | 12.70 | Crestwood, IL / 10,922 |
| 74. | 12.70 | Midlothian, IL / 14,581 |
| 75. | 12.73 | Silver Lake, WI / 2,418 |
| 76. | 12.73 | Chemung, IL / 225 |
| 77. | 12.73 | Schiller Park, IL / 11,668 |
| 78. | 12.73 | Steward, IL / 232 |
| 79. | 12.73 | Sauk Village, IL / 10,360 |
| 80. | 12.73 | Long Lake, IL / 3,063 |
| 81. | 12.73 | Worth, IL / 10,677 |
| 82. | 12.74 | Zion, IL / 24,375 |
| 83. | 12.75 | Diamond, IL / 2,461 |
| 84. | 12.77 | Chicago Ridge, IL / 14,145 |
| 85. | 12.78 | Elgin, IL / 106,837 |
| 86. | 12.80 | Leland, IL / 777 |
| 87. | 12.80 | Lyons, IL / 10,530 |
| 88. | 12.80 | West Chicago, IL / 26,348 |
| 89. | 12.81 | Boulder Hill, IL / 8,641 |
| 90. | 12.83 | Coal City, IL / 5,428 |
| 91. | 12.84 | Calumet City, IL / 36,975 |
| 92. | 12.85 | Sheridan, IL / 1,158 |
| 93. | 12.85 | Hillside, IL / 8,088 |
| 94. | 12.87 | Berkeley, IL / 5,159 |
| 95. | 12.88 | Hebron, IL / 1,078 |
| 96. | 12.88 | Plano, IL / 9,472 |
| 97. | 12.88 | Calumet Park, IL / 7,932 |
| 98. | 12.89 | Holiday Hills, IL / 674 |
| 99. | 12.90 | Wood Dale, IL / 13,678 |
| 100. | 12.90 | Walworth, WI / 2,765 |
| 101. | 12.91 | Steger, IL / 9,734 |
| 102. | 12.91 | Garden Prairie, IL / 185 |
| 103. | 12.92 | Lake Shangrila, WI / 679 |
| 104. | 12.93 | Hanover Park, IL / 37,743 |
| 105. | 12.94 | Verona, IL / 245 |
| 106. | 12.94 | Lake Ivanhoe, WI / 488 |
| 107. | 12.95 | Gardner, IL / 1,205 |
| 108. | 12.95 | Riverdale, IL / 13,629 |
| 109. | 12.95 | Wilmington, IL / 5,712 |
| 110. | 12.95 | Justice, IL / 12,633 |
| 111. | 12.95 | Kingston, IL / 1,129 |
| 112. | 12.96 | Crest Hill, IL / 20,313 |
| 113. | 12.99 | Bedford Park, IL / 574 |
| 114. | 12.99 | Joliet, IL / 145,002 |
| 115. | 12.99 | East Hazel Crest, IL / 1,715 |
| 116. | 13.04 | Braidwood, IL / 5,965 |
| 117. | 13.06 | Caledonia, IL / 215 |
| 118. | 13.06 | Alsip, IL / 19,134 |
| 119. | 13.06 | Romeoville, IL / 37,484 |
| 120. | 13.06 | Greenwood, IL / 167 |
| 121. | 13.07 | Seneca, IL / 2,407 |
| 122. | 13.07 | Broadview, IL / 7,924 |
| 123. | 13.07 | Davis Junction, IL / 2,189 |
| 124. | 13.10 | Genoa, IL / 5,529 |
| 125. | 13.11 | Marengo, IL / 7,881 |
| 126. | 13.11 | Hometown, IL / 4,324 |
| 127. | 13.12 | Lee, IL / 390 |
| 128. | 13.14 | North Riverside, IL / 6,660 |
| 129. | 13.14 | Kaneville, IL / 367 |
| 130. | 13.16 | Essex, IL / 582 |
| 131. | 13.16 | Somonauk, IL / 2,007 |
| 132. | 13.17 | Camp Lake, WI / 3,426 |
| 133. | 13.17 | Union, IL / 683 |
| 134. | 13.17 | Kirkland, IL / 1,647 |
| 135. | 13.17 | Hazel Crest, IL / 14,271 |
| 136. | 13.18 | Aurora, IL / 190,437 |
| 137. | 13.18 | Oak Forest, IL / 27,685 |
| 138. | 13.18 | River Grove, IL / 10,200 |
| 139. | 13.19 | Poplar Grove, IL / 5,084 |
| 140. | 13.21 | Ottawa, IL / 19,263 |
| 141. | 13.21 | Newark, IL / 898 |
| 142. | 13.22 | Forest View, IL / 834 |
| 143. | 13.22 | Griffith, IN / 16,959 |
| 144. | 13.22 | Paddock Lake, WI / 3,020 |
| 145. | 13.23 | Merrionette Park, IL / 2,247 |
| 146. | 13.25 | Monroe Center, IL / 560 |
| 147. | 13.25 | Lake Catherine, IL / 1,084 |
| 148. | 13.25 | Dolton, IL / 23,324 |
| 149. | 13.26 | Niles, IL / 29,463 |
| 150. | 13.27 | Powers Lake, WI / 1,427 |
| 151. | 13.28 | Fox Lake Hills, IL / 2,461 |
| 152. | 13.28 | Elmwood Park, IL / 24,710 |
| 153. | 13.29 | Crystal Lawns, IL / 2,001 |
| 154. | 13.29 | Oak Lawn, IL / 55,830 |
| 155. | 13.31 | Fox Lake, IL / 10,515 |
| 156. | 13.31 | Glendale Heights, IL / 33,664 |
| 157. | 13.31 | Prospect Heights, IL / 16,252 |
| 158. | 13.32 | Chicago, IL / 2,703,466 |
| 159. | 13.32 | Harwood Heights, IL / 8,462 |
| 160. | 13.32 | Lake Geneva, WI / 7,685 |
| 161. | 13.33 | Palos Hills, IL / 17,366 |
| 162. | 13.33 | Monee, IL / 4,916 |
| 163. | 13.33 | Lansing, IL / 28,005 |
| 164. | 13.34 | Manteno, IL / 8,551 |
| 165. | 13.34 | Hickory Hills, IL / 14,004 |
| 166. | 13.34 | Sandwich, IL / 7,707 |
| 167. | 13.36 | Lake Holiday, IL / 4,504 |
| 168. | 13.37 | Morris, IL / 13,533 |
| 169. | 13.37 | Streamwood, IL / 39,267 |
| 170. | 13.38 | Genoa City, WI / 2,888 |
| 171. | 13.39 | Island Lake, IL / 8,223 |
| 172. | 13.39 | Dayton, IL / 634 |
| 173. | 13.41 | Wonder Lake, IL / 3,562 |
| 174. | 13.42 | Twin Lakes, WI / 5,901 |
| 175. | 13.42 | Countryside, IL / 5,817 |
| 176. | 13.43 | Lily Lake, IL / 975 |
| 177. | 13.43 | Mchenry, IL / 26,518 |
| 178. | 13.44 | Beach Park, IL / 13,315 |
| 179. | 13.45 | Paw Paw, IL / 849 |
| 180. | 13.45 | Elwood, IL / 2,429 |
| 181. | 13.46 | Waterman, IL / 1,394 |
| 182. | 13.46 | Woodstock, IL / 24,414 |
| 183. | 13.49 | Montgomery, IL / 15,957 |
| 184. | 13.49 | Lynwood, IL / 8,725 |
| 185. | 13.50 | Big Rock, IL / 1,151 |
| 186. | 13.51 | Creston, IL / 781 |
| 187. | 13.53 | Park Forest, IL / 22,330 |
| 188. | 13.53 | Hampshire, IL / 5,101 |
| 189. | 13.54 | Malta, IL / 823 |
| 190. | 13.54 | Beecher, IL / 4,646 |
| 191. | 13.55 | Cortland, IL / 3,803 |
| 192. | 13.55 | Des Plaines, IL / 57,357 |
| 193. | 13.55 | South Holland, IL / 21,880 |
| 194. | 13.55 | Winthrop Harbor, IL / 6,791 |
| 195. | 13.57 | Round Lake, IL / 16,163 |
| 196. | 13.59 | Venetian Village, IL / 3,060 |
| 197. | 13.61 | Highland, IN / 23,710 |
| 198. | 13.62 | Rolling Meadows, IL / 23,601 |
| 199. | 13.63 | Villa Park, IL / 22,249 |
| 200. | 13.63 | Wauconda, IL / 13,009 |
| 201. | 13.69 | Orland Hills, IL / 7,011 |
| 202. | 13.71 | Lakemoor, IL / 5,765 |
| 203. | 13.73 | Glenwood, IL / 8,731 |
| 204. | 13.73 | Dyer, IN / 15,957 |
| 205. | 13.74 | Wheeling, IL / 37,030 |
| 206. | 13.75 | Channel Lake, IL / 1,793 |
| 207. | 13.77 | Bristol, WI / 2,563 |
| 208. | 13.79 | Pleasant Prairie, WI / 19,124 |
| 209. | 13.79 | Maple Park, IL / 1,474 |
| 210. | 13.80 | Ringwood, IL / 849 |
| 211. | 13.80 | Willow Springs, IL / 5,344 |
| 212. | 13.80 | Burlington, IL / 535 |
| 213. | 13.81 | Hinckley, IL / 2,154 |
| 214. | 13.81 | Westchester, IL / 16,542 |
| 215. | 13.82 | Cherry Valley, IL / 3,271 |
| 216. | 13.82 | East Dundee, IL / 2,928 |
| 217. | 13.82 | Evergreen Park, IL / 19,815 |
| 218. | 13.83 | Channahon, IL / 12,215 |
| 219. | 13.83 | Bolingbrook, IL / 72,649 |
| 220. | 13.85 | Johnsburg, IL / 6,294 |
| 221. | 13.86 | Country Club Hills, IL / 16,286 |
| 222. | 13.86 | Tinley Park, IL / 54,943 |
| 223. | 13.87 | Elk Grove Village, IL / 33,072 |
| 224. | 13.87 | Mundelein, IL / 31,146 |
| 225. | 13.87 | Carol Stream, IL / 39,740 |
| 226. | 13.88 | Richton Park, IL / 13,327 |
| 227. | 13.89 | Yorkville, IL / 15,065 |
| 228. | 13.90 | Lockport, IL / 23,844 |
| 229. | 13.91 | Schererville, IN / 28,478 |
| 230. | 13.91 | Lake In The Hills, IL / 28,596 |
| 231. | 13.94 | South Elgin, IL / 21,235 |
| 232. | 13.94 | Peotone, IL / 4,506 |
| 233. | 13.94 | Brookfield, IL / 18,807 |
| 234. | 13.98 | Richmond, IL / 1,954 |
| 235. | 13.99 | Millbrook, IL / 228 |
| 236. | 14.01 | Frankfort Square, IL / 9,525 |
| 237. | 14.01 | University Park, IL / 7,329 |
| 238. | 14.02 | Bloomingdale, IL / 21,877 |
| 239. | 14.02 | Mount Prospect, IL / 53,838 |
| 240. | 14.03 | Elburn, IL / 5,310 |
| 241. | 14.05 | Huntley, IL / 21,261 |
| 242. | 14.07 | Itasca, IL / 8,390 |
| 243. | 14.08 | Minooka, IL / 9,522 |
| 244. | 14.09 | Dekalb, IL / 43,995 |
| 245. | 14.10 | Sycamore, IL / 16,800 |
| 246. | 14.11 | Saint John, IN / 13,733 |
| 247. | 14.13 | Manhattan, IL / 6,511 |
| 248. | 14.14 | Munster, IN / 23,254 |
| 249. | 14.16 | Orland Park, IL / 55,098 |
| 250. | 14.19 | Matteson, IL / 17,756 |
| 251. | 14.19 | Wadsworth, IL / 3,859 |
| 252. | 14.19 | Morton Grove, IL / 22,868 |
| 253. | 14.21 | Shorewood, IL / 14,718 |
| 254. | 14.22 | Antioch, IL / 13,519 |
| 255. | 14.23 | Lemont, IL / 15,320 |
| 256. | 14.23 | Fox River Grove, IL / 5,080 |
| 257. | 14.23 | North Aurora, IL / 15,680 |
| 258. | 14.23 | Homer Glen, IL / 24,723 |
| 259. | 14.26 | Crete, IL / 8,442 |
| 260. | 14.29 | New Lenox, IL / 23,946 |
| 261. | 14.29 | Warrenville, IL / 13,214 |
| 262. | 14.30 | Mokena, IL / 18,164 |
| 263. | 14.30 | Forest Park, IL / 14,282 |
| 264. | 14.32 | Crystal Lake, IL / 41,044 |
| 265. | 14.35 | Timberlane, IL / 1,052 |
| 266. | 14.37 | Westmont, IL / 24,494 |
| 267. | 14.39 | Willowbrook CDP, IL / 2,402 |
| 268. | 14.39 | Lombard, IL / 42,722 |
| 269. | 14.39 | Hoffman Estates, IL / 51,203 |
| 270. | 14.43 | Lincolnwood, IL / 12,422 |
| 271. | 14.43 | Oakbrook Terrace, IL / 2,224 |
| 272. | 14.43 | Gages Lake, IL / 10,166 |
| 273. | 14.47 | Oakwood Hills, IL / 2,021 |
| 274. | 14.49 | Grandwood Park, IL / 4,998 |
| 275. | 14.50 | Schaumburg, IL / 73,333 |
| 276. | 14.50 | Bartlett, IL / 40,122 |
| 277. | 14.50 | Roselle, IL / 22,733 |
| 278. | 14.51 | Spring Grove, IL / 5,214 |
| 279. | 14.51 | Skokie, IL / 63,824 |
| 280. | 14.53 | Lindenhurst, IL / 14,227 |
| 281. | 14.53 | Woodridge, IL / 32,475 |
| 282. | 14.55 | Hainesville, IL / 3,330 |
| 283. | 14.55 | Algonquin, IL / 29,407 |
| 284. | 14.55 | Oswego, IL / 27,719 |
| 285. | 14.59 | Palatine, IL / 67,414 |
| 286. | 14.60 | Homewood, IL / 19,328 |
| 287. | 14.63 | Willowbrook, IL / 8,546 |
| 288. | 14.66 | West Dundee, IL / 7,078 |
| 289. | 14.67 | Palos Heights, IL / 12,185 |
| 290. | 14.67 | Sleepy Hollow, IL / 3,412 |
| 291. | 14.68 | Port Barrington, IL / 1,746 |
| 292. | 14.69 | La Grange Park, IL / 13,387 |
| 293. | 14.69 | Lake Villa, IL / 8,460 |
| 294. | 14.69 | Pingree Grove, IL / 3,780 |
| 295. | 14.69 | Saint Charles, IL / 32,392 |
| 296. | 14.70 | Plainfield, IL / 35,708 |
| 297. | 14.70 | Sugar Grove, IL / 8,202 |
| 298. | 14.71 | Knollwood, IL / 1,676 |
| 299. | 14.73 | Darien, IL / 22,163 |
| 300. | 14.73 | Gilberts, IL / 5,866 |
| 301. | 14.74 | Palos Park, IL / 4,785 |
| 302. | 14.75 | Volo, IL / 1,859 |
| 303. | 14.76 | Indian Head Park, IL / 3,795 |
| 304. | 14.80 | Old Mill Creek, IL / 142 |
| 305. | 14.80 | Cary, IL / 18,167 |
| 306. | 14.83 | Gurnee, IL / 31,068 |
| 307. | 14.90 | Arlington Heights, IL / 74,967 |
| 308. | 14.91 | Lake Zurich, IL / 19,554 |
| 309. | 14.91 | Park Ridge, IL / 37,115 |
| 310. | 14.94 | Trout Valley, IL / 507 |
| 311. | 14.95 | Elmhurst, IL / 43,753 |
| 312. | 14.98 | Downers Grove, IL / 47,938 |
| 313. | 15.00 | Batavia, IL / 25,924 |
| 314. | 15.06 | Vernon Hills, IL / 24,388 |
| 315. | 15.11 | Wayne, IL / 2,737 |
| 316. | 15.12 | Grayslake, IL / 20,671 |
| 317. | 15.13 | Bull Valley, IL / 1,156 |
| 318. | 15.13 | Olympia Fields, IL / 4,718 |
| 319. | 15.16 | Indian Creek, IL / 533 |
| 320. | 15.20 | Forest Lake, IL / 1,814 |
| 321. | 15.21 | Winfield, IL / 9,041 |
| 322. | 15.22 | Geneva, IL / 21,448 |
| 323. | 15.25 | Fontana-On-Geneva Lake Village, WI / 1,646 |
| 324. | 15.26 | Campton Hills, IL / 10,780 |
| 325. | 15.28 | Frankfort, IL / 17,056 |
| 326. | 15.30 | Deer Park, IL / 3,229 |
| 327. | 15.30 | Lakewood, IL / 3,754 |
| 328. | 15.35 | Oak Brook, IL / 7,905 |
| 329. | 15.36 | Lisle, IL / 22,288 |
| 330. | 15.37 | Buffalo Grove, IL / 41,859 |
| 331. | 15.38 | La Grange, IL / 15,430 |
| 332. | 15.40 | Libertyville, IL / 20,530 |
| 333. | 15.43 | Northfield, IL / 5,429 |
| 334. | 15.43 | Wheaton, IL / 53,141 |
| 335. | 15.44 | Prairie Grove, IL / 1,867 |
| 336. | 15.46 | Riverside, IL / 8,737 |
| 337. | 15.47 | Glen Ellyn, IL / 27,397 |
| 338. | 15.52 | Prestbury, IL / 1,814 |
| 339. | 15.54 | Glenview, IL / 43,649 |
| 340. | 15.58 | Mettawa, IL / 597 |
| 341. | 15.61 | Hawthorn Woods, IL / 7,405 |
| 342. | 15.64 | Barrington Hills, IL / 4,165 |
| 343. | 15.70 | Third Lake, IL / 1,503 |
| 344. | 15.72 | Naperville, IL / 140,838 |
| 345. | 15.74 | Riverwoods, IL / 3,920 |
| 346. | 15.76 | North Barrington, IL / 3,044 |
| 347. | 15.78 | Evanston, IL / 73,880 |
| 348. | 15.78 | Tower Lake, IL / 1,473 |
| 349. | 15.83 | Northbrook, IL / 32,922 |
| 350. | 15.87 | Inverness, IL / 7,129 |
| 351. | 15.89 | Barrington, IL / 10,662 |
| 352. | 15.92 | Highland Park, IL / 30,080 |
| 353. | 15.92 | Long Grove, IL / 7,866 |
| 354. | 15.92 | Clarendon Hills, IL / 8,275 |
| 355. | 15.97 | Oak Park, IL / 51,426 |
| 356. | 15.97 | Flossmoor, IL / 9,218 |
| 357. | 15.98 | Lake Barrington, IL / 4,840 |
| 358. | 16.02 | Golf, IL / 593 |
| 359. | 16.06 | Green Oaks, IL / 3,832 |
| 360. | 16.07 | Burr Ridge, IL / 10,505 |
| 361. | 16.14 | Western Springs, IL / 12,657 |
| 362. | 16.22 | Lincolnshire, IL / 7,077 |
| 363. | 16.23 | Lake Forest, IL / 19,397 |
| 364. | 16.31 | Bannockburn, IL / 1,369 |
| 365. | 16.32 | Deerfield, IL / 18,405 |
| 366. | 16.34 | Hinsdale, IL / 16,633 |
| 367. | 16.40 | South Barrington, IL / 4,385 |
| 368. | 16.45 | Kildeer, IL / 3,889 |
| 369. | 16.54 | River Forest, IL / 11,166 |
| 370. | 16.60 | Wilmette, IL / 26,928 |
| 371. | 16.76 | Lake Bluff, IL / 6,035 |
| 372. | 17.04 | Kenilworth, IL / 2,524 |
| 373. | 17.09 | Winnetka, IL / 12,112 |
| 374. | 17.17 | Glencoe, IL / 8,628 |
Please note that we only rank locations with 'Average Education Index' data. The rank above might not be a complete list. Locations without 'Average Education Index' data are not listed.
*ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.