(CO-99-13) Population Estimates for Counties by Age Group:  July 1, 1991
  
Source:  Population Estimates Program, Population Division, U.S. Census Bureau, Washington, DC  20233
Contact:  Statistical Information Staff, Population Division, U.S. Census Bureau (301-457-2422)
          pop@census.gov (please include a phone number with email correspondence)
  
Internet Release Date:  August 30, 2000

                                        Total      Ages     Ages     Ages     Ages     Ages     Ages     Ages     Ages     Ages
Area Name                          Population       0-4     5-17    18-24    25-44    45-64      16+      21+      65+      85+
                                                                                                                               
    ILLINOIS                         11535973    881610  2101734  1190488  3760996  2150154  8861493  8038747  1450991   151440
Adams County                            66474      4713    12422     5906    18837    12924    51101    46623    11672     1595
Alexander County                        10586       926     2151      807     2767     2059     7815     7165     1876      217
Bond County                             15126       971     2719     1720     4238     2855    11820    10629     2623      323
Boone County                            31671      2453     6404     2930     9988     6262    23796    21493     3634      399
Brown County                             6163       329      982      699     2184     1011     4982     4598      958      149
Bureau County                           35700      2388     7038     2715    10041     7050    27328    25023     6468      760
Calhoun County                           5281       344      942      411     1362     1153     4137     3817     1069      123
Carroll County                          16636      1072     3100     1189     4594     3511    12956    11934     3170      399
Cass County                             13441       888     2581     1100     3873     2694    10353     9508     2305      322
Champaign County                       173952     12216    25871    38848    56820    24823   139510   116496    15374     1721
Christian County                        35081      2398     6341     2933    10182     7070    27328    25045     6157      799
Clark County                            15882      1048     2854     1239     4444     3227    12399    11421     3070      384
Clay County                             14513       921     2777     1085     4098     2867    11208    10344     2765      380
Clinton County                          34037      2381     6802     3195    10666     6281    25835    23540     4712      543
Coles County                            51521      2893     7817    11638    13508     8532    41925    34548     7133      887
Cook County                           5124753    397992   893146   536296  1704449   956068  3968160  3617352   636802    60055
Crawford County                         20082      1252     3584     1617     5975     4102    15796    14498     3552      372
Cumberland County                       10764       819     2185      914     3047     2083     8077     7360     1716      196
DeKalb County                           79272      5078    11936    19692    22479    11901    63988    52428     8186      991
De Witt County                          16613      1139     3151     1289     4932     3363    12759    11760     2739      332
Douglas County                          19452      1437     4053     1398     5649     3953    14530    13342     2962      346
DuPage County                          800222     66251   144802    73552   296810   147974   609566   559550    70833     6841
Edgar County                            19461      1261     3722     1411     5413     3973    15060    13830     3681      493
Edwards County                           7391       470     1360      562     2088     1452     5752     5302     1459      173
Effingham County                        31887      2804     6780     2603     9627     5593    23201    21187     4480      531
Fayette County                          20770      1366     3807     1730     6154     4007    16146    14831     3706      450
Ford County                             14043       935     2698      941     3939     2802    10805    10003     2728      438
Franklin County                         40207      2481     7198     3297    11073     8083    31719    29015     8075      888
Fulton County                           38220      2231     7051     3138    11068     7535    30005    27571     7197      869
Gallatin County                          6805       420     1194      573     1799     1513     5388     4917     1306      154
Greene County                           15261      1085     2968     1218     4096     3035    11630    10680     2859      363
Grundy County                           33247      2427     6791     2832    10699     6218    25027    22794     4280      435
Hamilton County                          8465       506     1521      568     2272     1753     6657     6165     1845      232
Hancock County                          21416      1375     4134     1496     6007     4391    16486    15216     4013      496
Hardin County                            5127       281      938      447     1450     1106     4042     3699      905      107
Henderson County                         8134       529     1566      537     2321     1885     6293     5782     1296      148
Henry County                            51085      3464    10276     3852    14689    10422    38771    35529     8382     1027
Iroquois County                         30883      2051     5936     2157     8584     6447    23758    21931     5708      704
Jackson County                          60706      3428     8203    16930    17095     8489    50247    40801     6561      681
Jasper County                           10597       780     2232      770     2995     2000     7885     7232     1820      250
Jefferson County                        37060      2764     7210     2979    10990     6984    28107    25778     6133      687
Jersey County                           20751      1471     4094     2176     6071     4055    15802    14171     2884      313
Jo Daviess County                       21911      1440     4280     1628     6204     4611    16845    15463     3748      419
Johnson County                          11548       560     1730     1143     4009     2389     9551     8802     1717      181
Kane County                            326394     29324    68174    31352   112296    55148   238361   215331    30100     3528
Kankakee County                         97425      7638    19921     9308    29138    18144    72748    65607    13276     1309
Kendall County                          40391      3141     8917     3526    13485     7769    29643    26723     3553      325
Knox County                             56344      3447     9988     5097    16595    11468    44422    40535     9749     1292
Lake County                            530207     46105   100731    55264   187243    96094   397355   357421    44770     4306
La Salle County                        107377      7363    20055     9030    31041    21345    82890    75805    18543     2146
Lawrence County                         15969       979     2835     1172     4450     3214    12562    11616     3319      477
Lee County                              34676      2434     6545     2887    11088     6636    26608    24489     5086      609
Livingston County                       39088      2691     7178     3239    12478     7329    30261    27920     6173      956
Logan County                            30783      1984     5314     3134     9608     5810    24248    21980     4933      721
McDonough County                        35242      1751     4699    10118     8406     5417    29527    23075     4851      693
McHenry County                         192470     16878    39195    15541    68805    34120   141701   129745    17931     1812
McLean County                          131639      8929    21702    26583    40294    20538   103978    87639    13593     1706
Macon County                           117698      8242    22373    10549    35449    23933    90370    82090    17152     1978
Macoupin County                         47895      3143     9293     3940    13433     9476    36854    33649     8610     1087
Madison County                         251821     18408    46160    23608    78652    49846   194138   177151    35147     3544
Marion County                           41574      2958     8121     3324    11992     8125    31676    28977     7054      827
Marshall County                         12809       774     2442      973     3526     2607     9963     9148     2487      324
Mason County                            16448      1105     3185     1270     4621     3391    12631    11578     2876      327
Massac County                           14804       856     2665     1133     4113     3181    11698    10748     2856      349
Menard County                           11261       780     2301      773     3501     2213     8502     7813     1693      222
Mercer County                           17316      1139     3472     1281     4995     3615    13236    12121     2814      356
Monroe County                           22983      1693     4458     1842     7314     4595    17404    16055     3081      373
Montgomery County                       30746      2084     5721     2453     9161     5722    23746    21907     5605      774
Morgan County                           36399      2353     6547     3850    10811     7036    28444    25645     5802      770
Moultrie County                         13947       961     2719      951     3932     2727    10675     9859     2657      499
Ogle County                             46914      3480     9445     3721    14479     9255    35334    32338     6534      818
Peoria County                          183956     13292    34619    19390    55547    34955   141171   126887    26153     2904
Perry County                            21378      1472     4166     1769     6182     4110    16369    14926     3679      438
Piatt County                            15629      1006     3011     1084     4776     3333    12052    11087     2419      300
Pike County                             17476      1126     3223     1305     4689     3501    13583    12518     3632      493
Pope County                              4461       220      804      544     1221      895     3630     3153      777       95
Pulaski County                           7441       557     1619      562     1896     1444     5487     4996     1363      183
Putnam County                            5747       406     1095      431     1672     1240     4405     4032      903       69
Randolph County                         34456      2147     6266     3220    11183     6276    26952    24793     5364      649
Richland County                         16619      1153     3163     1284     4732     3378    12743    11683     2909      368
Rock Island County                     149211     10523    27535    13949    44864    29986   115046   104703    22354     2279
St. Clair County                       262395     21597    53224    25226    81816    46933   195451   176446    33599     3545
Saline County                           26362      1632     4747     2045     7158     5457    20803    19000     5323      640
Sangamon County                        181596     13358    33174    15191    60722    34302   139653   128853    24849     2768
Schuyler County                          7552       450     1432      558     2139     1546     5892     5409     1427      195
Scott County                             5584       385     1084      419     1585     1129     4263     3923      982      126
Shelby County                           22310      1524     4247     1741     6191     4592    17156    15752     4015      473
Stark County                             6447       411     1245      441     1759     1335     4985     4591     1256      157
Stephenson County                       48207      3459     8966     4035    14439     9553    37111    33914     7755      880
Tazewell County                        124595      8586    24268    10443    38474    26086    95332    87056    16738     1780
Union County                            17663      1089     3023     1374     5040     3801    14037    12931     3336      362
Vermilion County                        87887      5992    16786     7128    26123    17843    67679    61897    14015     1457
Wabash County                           13107       851     2565     1118     3879     2545    10069     9127     2149      245
Warren County                           19215      1244     3747     1948     5286     3690    14772    13292     3300      475
Washington County                       14862      1007     2903     1060     4263     2872    11355    10477     2757      348
Wayne County                            17002      1083     3079     1373     4561     3541    13323    12204     3365      399
White County                            16377      1010     2847     1122     4594     3402    12911    12040     3402      390
Whiteside County                        60455      4265    11979     4972    17899    12180    46120    41871     9160      962
Will County                            366975     30935    78535    35449   126602    63517   268737   241552    31937     2902
Williamson County                       57877      3759    10144     4999    17459    11715    45577    41761     9801     1084
Winnebago County                       256928     19953    47568    23536    83664    49420   196536   179285    32787     3604
Woodford County                         33386      2440     7167     2692    10089     6317    24772    22450     4681      569

The estimates presented here were produced by a method which is still in a developmental stage.  They
may not be accurate for populations which are very small or have unusual distributions.  These figures
should be used with caution.