Baulne-en-Brie (French pronunciation: [bo(l)n ɑ̃ bʁi], literally Baulne in Brie) is a former commune in the department of Aisne in northern France. On 1 January 2016, it was merged into the new commune Vallées-en-Champagne, of which it is a delegated commune.

Baulne-en-Brie is located some 15 km east by south-east of Château-Thierry and 20 km west by south-west of Épernay. It can be accessed by the D4 road from Condé-en-Brie in the west through the heart of the commune and the village and continuing east to Le Breuil. There is also a country road from La Chapelle-Monthodon in the north. The south-eastern border of the commune is part of the border between the departments of Aisne and Marne. There are three hamlets in the commune other than the village: Montchevret, Grande Fontaine, and Romandie. There are extensive forests in the north, centre, south-east and south of the commune with the rest of the area being farmland.

The Verdonnelle stream flows north-west through the southern part of the commune passing near the hamlet of Romandie and continuing north-west out of the commune. The Surmelin stream flows from the south-east passing through the village and continuing north-west to join the Marne near Mézy-Moulins.

This list is incomplete; you can help by adding missing items. (April 2021)

List of Successive Mayors of Baulne-en-Brie

From	To	Name	Party
2001	2008	Gilles Hiernard	DVD
2008	2016	Bruno Lahouati

Historical population

Year Pop. ±% p.a. 1793 428 —     1800 515 +2.68% 1806 572 +1.76% 1821 589 +0.20% 1831 637 +0.79% 1836 628 −0.28% 1841 673 +1.39% 1846 730 +1.64% 1851 724 −0.16% 1856 702 −0.62% 1861 639 −1.86% 1866 633 −0.19% 1872 562 −1.96% 1876 537 −1.13% 1881 504 −1.26% 1886 512 +0.32% 1891 527 +0.58% 1896 510 −0.65%	Year Pop. ±% p.a. 1901 442 −2.82% 1906 420 −1.02% 1911 440 +0.93% 1921 380 −1.46% 1926 371 −0.48% 1931 334 −2.08% 1936 347 +0.77% 1946 299 −1.48% 1954 268 −1.36% 1962 256 −0.57% 1968 220 −2.49% 1975 194 −1.78% 1982 243 +3.27% 1990 219 −1.29% 1999 238 +0.93% 2007 290 +2.50% 2012 262 −2.01% 2021 289 +1.10%
Source: EHESS and INSEE

Baulne-en-Brie is an agricultural and wine-producing village and a part of the Appellation d'origine contrôlée (AOC) zone for "Champagne of Aisne".

The commune has two sites that are registered as historical monuments:

• The Madame Max Park
• The Chateau Park

Other sites of interest

• The Place Daniel Beaucreux in front of the church. In memory of the men and women of the Canton of Condé-en-Brie and the region who experienced deportation and death in the Nazi concentration camps. Marked: "Dead in Deportation, alive in our memories".
• A Lavoir (Public laundry) in the main street has been decorated on the theme of the fable "The dairy and milk jug".
• Little Switzerland of Condé, the area around the hamlet of Romandie, gives access to the Verdonnelle valley.
• A Directional table opposite the Chemin de Glapiers on the road to Saint-Agnan offers an outstanding view of the Surmelin valley.

The commune has several religious buildings and structures that are registered as historical monuments:

• The Church of Saint Bartholomew (12th century). It has one of the last wooden ceilings with alternating grain slats in the world. The Church contains three items that are registered as historical objects:
  • A Funeral Plaque of Madeleine de Castellan, widow of Louis Mallart, Counsellor to the King (1633)
  • The Tombstone of Guillaume de Baulne (1255)
  • A Pulpit with 3 Bas-reliefs (16th century)

• Communes of the Aisne department

• Baulne-en-Brie on the old National Geographic Institute website (in French)
• Baulne-en-Brie on the Union for initiative of the canton of Condé-en-Brie official website (in French)
• Baulne-en-Brie official website (in French)
• The Prison Door from La Petite Roquette prison (in French)