| 1998 Danish Amsterdam Treaty referendum | |
| Country: | Denmark |
| Date: | 28 May 1998 |
| Ratification of the Treaty of Amsterdam by Denmark | |
| Yes: | 1647692 |
| No: | 1342595 |
| Invalid: | 56494 |
| Electorate: | 3996333 |
| Map: | Folkeafstemning 1998 - Opstillingskredse.svg |
A referendum on the Amsterdam Treaty was held in Denmark on 28 May 1998.[1] It was approved by 55.1% of voters with a turnout of 76.2%.[2] The treaty subsequently came into effect on 1 May 1999.[2]
The Danish parties and lists recommended voting as follows:[3]
| Choice | Votes | % |
|---|---|---|
| For | 1,647,692 | 55.1 |
| Against | 1,342,595 | 44.9 |
| Invalid/blank votes | 56,494 | – |
| Total | 3,046,781 | 100 |
| Registered voters/turnout | 3,996,333 | 76.2 |
| align=left colspan=3 | Source: Nohlen & Stöver |
| Region | For | Against | Electorate | Votes |
|---|---|---|---|---|
| 158,900 | 164,191 | 444,557 | 330,925 | |
| 190,788 | 159,972 | 450,398 | 356,344 | |
| Frederiksborg County | 119,897 | 88,414 | 267,409 | 211,610 |
| Roskilde County | 74,830 | 59,554 | 171,719 | 136,565 |
| West Zealand County | 86,285 | 80,025 | 222,245 | 169,045 |
| Storstrøm County | 79,374 | 73,517 | 200,520 | 155,609 |
| Bornholm County | 13,068 | 11,590 | 34,241 | 25,251 |
| Fyn County | 148,186 | 119,884 | 359,586 | 273,332 |
| 82,212 | 62,315 | 189,032 | 146,954 | |
| 70,532 | 50,830 | 166,102 | 123,695 | |
| Vejle County | 108,046 | 84,118 | 259,947 | 195,559 |
| Ringkjøbing County | 92,013 | 58,040 | 202,723 | 153,211 |
| Århus County | 153,211 | 156,532 | 475,999 | 365,687 |
| Viborg County | 76,342 | 52,030 | 175,791 | 131,104 |
| North Jutland County | 145,523 | 121,583 | 376,064 | 271,890 |
| align=left colspan=9 | Source: European Election Database |